Zinn's son, Captain George Zinn, demonstrated the Browning machine gun to the American Expeditionary Force during World War I. His grandson George Zinn was a pilot who was killed during a mid-air collision over Trenton, New Jersey.
- Nicholson, John (1904). Pennsylvania at Gettysburg. Harrisburg. pp. 466. http://books.google.com/books?id=D9efAAAAMAAJ&pg=PA466&lpg=PA466&dq=general+George+Zinn&source=bl&ots=-rQL_ox-oQ&sig=bqNhj8_jwvr3MUvoi4NGastNsiA&hl=en&ei=trHsSaXHE4uSMqjDudUF&sa=X&oi=book_result&ct=result&resnum=8#PPA466,M1.
- Yoseloff, Thomas (1956). Battles & Leaders of the Civil War. 4. pp. 748. http://ehistory.osu.edu/osu/books/battles/vol4/pageview.cfm?page=748.