- Oscar Hammerstein II. (2010). Retrieved December 2, 2010 from http://www.rnh.com/people_detail.asp?sub=bio&div=people&id=O_Hammerst&s=1
- Oscar Hammerstein II. (2004). Retrieved December 2, 2010 from http://www.pbs.org/wnet/broadway/stars/hammerstein_o.html
- Oscar Hammerstein. (2010). Retrieved December 2, 2010 from http://www.notablebiographies.com/Gi-He/Hammerstein-Oscar.html
- The Broadway League. (2010). Oscar Hammerstein II. Retrieved December 2, 2010 from http://www.ibdb.com/person.php?id=7965