Fix citation formatting

README.md

@@ -132,6 +132,7 @@ Example 4 (returns the average regard score):
 ```
 
 ## Citation(s)
+```python
 @article{https://doi.org/10.48550/arxiv.1909.01326,
   doi = {10.48550/ARXIV.1909.01326},
   url = {https://arxiv.org/abs/1909.01326},
@@ -140,6 +141,7 @@ Example 4 (returns the average regard score):
   publisher = {arXiv},
   year = {2019}
 }
+```
 
 
 ## Further References