Update README.md

README.md

@@ -8,12 +8,14 @@ The ImageNet-A dataset contains 7,500 natural adversarial examples.
 
 Also see the ImageNet-C and ImageNet-P datasets at https://github.com/hendrycks/robustness
 
+```bibtex
 @article{hendrycks2019nae,
   title={Natural Adversarial Examples},
   author={Dan Hendrycks and Kevin Zhao and Steven Basart and Jacob Steinhardt and Dawn Song},
   journal={arXiv preprint arXiv:1907.07174},
   year={2019}
 }
+```
 
 There are 200 classes we consider. The WordNet ID and a description of each class is as follows.