United States. Army. Army Map Service. Polillo NE. Army Map Service, U.S. Army, 1944.
Chicago-viite (17. p.)United States. Army. Army Map Service. Polillo NE. Washington, D.C: Army Map Service, U.S. Army, 1944.
MLA-viite (9. p.)United States. Army. Army Map Service. Polillo NE. Army Map Service, U.S. Army, 1944.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.