Incorporated Eline and Hawre's comments

Author: feralaes

manuscript/WorkingPapers-CohortModelsR.bib

@@ -1087,3 +1087,17 @@ @article{Spedicato2017
 volume = {9},
 year = {2017}
 }
+
+@incollection{Wickham2021,
+address = {Sebastopol, CA},
+author = {Wickham, Hadley and Bryan, Jenny},
+booktitle = {R Packages. Organize, test, document and share your code},
+chapter = {12},
+edition = {2},
+file = {:Users/fae/Mendeley Desktop/Wickham, Bryan/R Packages. Organize, test, document and share your code/Wickham, Bryan - 2021 - Testing.pdf:pdf},
+mendeley-groups = {R},
+pages = {1--13},
+publisher = {O'Reilly Media},
+title = {{Testing}},
+year = {2021}
+}