Gaya APA

Service, P, A, N. (1969). The instrument rating : a complete guide to all required test subjects and the written examinations. (Ed. 22nd Revised). California: Pan American Navigation Service.

Gaya MLA

Service, Pan, American, Navigation. "The instrument rating : a complete guide to all required test subjects and the written examinations.". Ed. 22nd Revised California: Pan American Navigation Service, 1969. Text.