University, U. c. S. L. (1969). Cadet Col. John Martel, a member of the Parks Guard, May 11, 1969.
Chicago-referens (17:e uppl.)University, Unknown creator; St. Louis. Cadet Col. John Martel, a Member of the Parks Guard, May 11, 1969. 1969.
MLA-referens (8:e uppl.)University, Unknown creator; St. Louis. Cadet Col. John Martel, a Member of the Parks Guard, May 11, 1969. 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.