diff --git a/howTo/apiTutorial.Rmd b/howTo/apiTutorial.Rmd
index 19d4421ed3df5616df68f9bbff39ba013f97d4c5..64d07c86c6e39ef50e2906ef8844c316d41248ef 100644
--- a/howTo/apiTutorial.Rmd
+++ b/howTo/apiTutorial.Rmd
@@ -220,3 +220,6 @@ ggplot(intensity48h, aes(periodEnd)) +
   theme(legend.position = "bottom")
 ```
 
+## Resources
+
+* [Getting started with httr](https://cran.r-project.org/web/packages/httr/vignettes/quickstart.html)
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