Wampler, Angela (February 25, 2007). "Robert Porterfield's Legacy". A! Magazine for the Arts. Archived from the original on July 30, 2016. Retrieved April 21, 2018.
books.google.com
Sherman, Dale (2016). "16". M.A.S.H. FAQ: Everything Left to Know About the Best Care Anywhere. Milwaukee, Wisconsin: Applause Books. ISBN9781480355897.
According to the State of California. California Birth Index, 1905–1995. Center for Health Statistics, California Department of Health Services, Sacramento, California. Searchable at Family Tree Legends
Wampler, Angela (February 25, 2007). "Robert Porterfield's Legacy". A! Magazine for the Arts. Archived from the original on July 30, 2016. Retrieved April 21, 2018.