Update README.md

Author: mnievesc

README.md

@@ -14,6 +14,6 @@ Commands will look like this:
 echo "I am a command, please type or copy-paste me into your terminal"
 ```
 
-We will be working with exampe files in .bed format I downloaded and modified from the UCSC genome browser (https://genome.ucsc.edu/). I picked the .bed format because the fiels are organized in tab delimited column format which is exactly the type of data that awk excels at working with. For more on the .bed format see: https://genome.ucsc.edu/FAQ/FAQformat.html#format1. I also want to mention that the content and structure of this tutorial is largely based on the great chapter **Unix Data Tools** in Buffalo, V (2015). Bioinformatic Data Skills. O'Reilly Media.
+We will be working with exampe files in .bed format I downloaded and modified from the UCSC genome browser (https://genome.ucsc.edu/). I picked the .bed format because the fiels are organized in tab delimited column format which is exactly the type of data that awk excels at working with. For more on the .bed format see: https://genome.ucsc.edu/FAQ/FAQformat.html#format1. I also want to mention that the content and structure of this tutorial is largely based on the great chapter **Unix Data Tools** in *Buffalo V (2015). Bioinformatics Data Skills. O'Reilly Media*.