United National Association of Post Office Craftsmen. (1957). The post office employee. United National Association of Post Office Craftsmen.
Chicago-referens (17:e uppl.)United National Association of Post Office Craftsmen. The Post Office Employee. Washington, D.C.: United National Association of Post Office Craftsmen, 1957.
MLA-referens (8:e uppl.)United National Association of Post Office Craftsmen. The Post Office Employee. United National Association of Post Office Craftsmen, 1957.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.