Add information about citing BlackLab.

README.md

@@ -10,6 +10,8 @@ To learn how to index and search your data, see the [official project site](http
 
 To learn about BlackLab development, see the [dev docs](doc/#readme). 
 
+If you wish to cite BlackLab, see [Citing BlackLab](https://inl.github.io/BlackLab/guide/about.html#citing-blacklab). Thank you!
+
 ## Branches
 
 The default branch, **dev**, corresponds to the "bleeding edge" in-development version. You can certainly run it (we do), but if you need maximum stability, it might be better to stay on a stable release instead. 

site/docs/guide/about.md

@@ -12,6 +12,16 @@ BlackLab was developed at the [Dutch Language Institute (INT)](http://www.ivdnt.
 
 For technical questions, contact [Jan Niestadt](mailto:[email protected]).
 
+## Citing BlackLab
+
+If you wish to cite BlackLab, you can use the following publication:
+
+> Does, Jesse de, Jan Niestadt en Katrien Depuydt (2017), Creating research environments with BlackLab. In: Jan Odijk and Arjan van Hessen (eds.) _CLARIN in the Low Countries_, pp. 151-165. London: Ubiquity Press. DOI: https://doi.org/10.5334/bbi
+
+In other contexts, linking to this website or the GitHub repositories is also a good way to refer people to the project.
+
+Thank you!
+
 ## Older resources
 
 * [Old BlackLab blog](/development/archive/blog.md)