APA (7th ed.) Citation

Shockley, P. M. (1958). The trap-door Springfield in the service ([5th ed.].). World-Wide Gun Report, Inc..

Chicago Style (17th ed.) Citation

Shockley, Philip M. The Trap-door Springfield in the Service. [5th ed.]. Aledo, Ill.: World-Wide Gun Report, Inc., 1958.

MLA (9th ed.) Citation

Shockley, Philip M. The Trap-door Springfield in the Service. [5th ed.]. World-Wide Gun Report, Inc., 1958.