minor polish

Author: trevorcampbell

reading.Rmd

@@ -1252,7 +1252,7 @@ found in Chapter \@ref(move-to-your-own-machine).
 - If you read the subsection on obtaining data from the web via scraping and
   APIs, we provide two companion tutorial video links for how to use the
   SelectorGadget tool to obtain desired CSS selectors for:
-    - [extracting the price and size data for apartment listings on Craigslist](https://dmi3kno.github.io/polite/)
-    - [extracting Canadian city names and 2016 census populations from Wikipedia](https://www.youtube.com/embed/O9HKbdhqYzk)
+    - [extracting the data for apartment listings on Craigslist](https://dmi3kno.github.io/polite/), and
+    - [extracting Canadian city names and 2016 populations from Wikipedia](https://www.youtube.com/embed/O9HKbdhqYzk).
 - The [`polite` R package](https://dmi3kno.github.io/polite/) [@polite] provides
   a set of tools for responsibly scraping data from websites. 

viz.Rmd

@@ -1535,7 +1535,7 @@ found in Chapter \@ref(move-to-your-own-machine).
 - The [`theme` function documentation](https://ggplot2.tidyverse.org/reference/theme.html)
   is an excellent reference to see how you can fine tune the non-data aspects 
   of your visualization.
-- *R for Data Science* has a chapter on [dates and
+- *R for Data Science* [@wickham2016r] has a chapter on [dates and
   times](https://r4ds.had.co.nz/dates-and-times.html).  This chapter is where
   you should look if you want to learn about `date` vectors, including how to
   create them, and how to use them to effectively handle durations, periods and