Add Advanced R book

Add separate language shelve
2 changed files with 9 additions and 0 deletions
--- a/langs/R.bib
+++ b/langs/R.bib
@ -0,0 +1,9 @@
+@misc{advanced-R,
+	author = {Wickham, Hadley},
+	title = {{Advanced R}},
+	year = {2023},
+	month = apr,
+	language = {english},
+	note = {[Online; accessed 25. Apr. 2023]},
+	url = {https://adv-r.hadley.nz}
+}
--- a/langs/haskell.bib
+++ b/langs/haskell.bib
Author	SHA1	Message	Date
Aleksey Zubakov	5879a3df49	Add Advanced R book	2 years ago
Aleksey Zubakov	fec8a7d15a	Add separate language shelve	2 years ago