First of all thank you for taking care of all the *.csls!

I'm using your latest ASA style (asa.csl). According to ASA style guide a website should be cited

The University of Chicago Press. 2019. "Chicago-Style Citation Quick Guide." Retrieved February 10, 2019 (https://www.chicagomanualofstyle.org/tools_citationguide.html).

however with asa.csl the result is just:

The University of Chicago Press. 2019. "Chicago-Style Citation Quick Guide."

This is how the *.bib-file looks:

@misc{the_university_of_chicago_press_chicago-style_2019,
	title = {Chicago-{Style} {Citation} {Quick} {Guide}.},
	url = {https://www.chicagomanualofstyle.org},
	abstract = {Find it. Write it. Cite it. The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. ¶ It is the indispensable reference for writers, editors, proofreaders, indexers, copywriters, designers, and publishers, informing the editorial canon with sound, definitive advice. ¶ Over 1.5 million copies sold!},
	language = {en},
	urldate = {2019-02-10},
	author = {{The University of Chicago Press}},
	month = feb,
	year = {2019},
	file = {Snapshot:C\:\\Users\\jay\\Zotero\\storage\\GDVNXDRS\\tools_citationguide.html:text/html}
}

I'm using R with Rmarkdown, specify csl: "../R/tex/asa.csl" in the YAML header, and add <div id="refs"></div> at the end after references header.

Since Rmarkdown uses Chicago author-date format for citations and references by default and at least the link appears in the references if no explicit *.csl is specified, the issue might be related to the asa.csl.

sessioninfo() yields:

> sessionInfo()
R version 3.5.2 (2018-12-20)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] compiler_3.5.2  backports_1.1.3 rprojroot_1.3-2 htmltools_0.3.6 tools_3.5.2    
 [6] yaml_2.2.0      Rcpp_1.0.0      rmarkdown_1.8   knitr_1.21      xfun_0.4       
[11] digest_0.6.18   evaluate_0.12  

> rmarkdown::pandoc_version()
[1] ‘1.19.2.1’

# MiKTeX 2.9

It would be great if you could look into this issue, thanks!