APA (7th ed.) Zitazioa

(1943). Instruction manual, revised model P4 synchroscope.

Chicago Style (17th ed.) Zitazioa

Instruction Manual, Revised Model P4 Synchroscope. 1943.

MLA (9th ed.) Zitazioa

Instruction Manual, Revised Model P4 Synchroscope. 1943.