Update README.md

Author: msonderegger

README.md

@@ -13,4 +13,4 @@ available at http://polyglotdb.readthedocs.io/en/latest/.
 Citation
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-McAuliffe, Michael, Elias Stengel-Eskin, Michaela Socolof, and Morgan Sonderegger (2017). Polyglot and Speech Corpus Tools: a system for representing, integrating, and querying speech corpora. In *Proceedings of Interspeech 2017*.
+McAuliffe, Michael, Elias Stengel-Eskin, Michaela Socolof, and Morgan Sonderegger (2017). Polyglot and Speech Corpus Tools: a system for representing, integrating, and querying speech corpora. In *Proceedings of Interspeech 2017*, pp. 3887–3891. [https://doi.org/10.21437/Interspeech.2017-1390](https://doi.org/10.21437/Interspeech.2017-1390).