APA (7. basım) Alıntı

Civilian Conservation Corps (U.S.). Company 1640. Twin Hill billy. Company 1640.

Chicago Style (17. basım) Atıf

Civilian Conservation Corps (U.S.). Company 1640. Twin Hill Billy. Port Angeles, Wash.: Company 1640.

MLA (8th ed.) Atıf

Civilian Conservation Corps (U.S.). Company 1640. Twin Hill Billy. Company 1640.