Add cite this project

README.md

@@ -220,3 +220,17 @@ dist/labelme --version
 
 This repo is the fork of [mpitid/pylabelme](https://github.com/mpitid/pylabelme),
 whose development has already stopped.
+
+
+## Cite This Project
+
+If you use this project in your research or wish to refer to the baseline results published in the README, please use the following BibTeX entry.
+
+```bash
+@misc{labelme2016,
+  author =       {Ketaro Wada},
+  title =        {{labelme: Image Polygonal Annotation with Python}},
+  howpublished = {\url{https://github.com/wkentaro/labelme}},
+  year =         {2016}
+}
+```