APA (7. basım) Alıntı

Santos, E. B. (1981). Trails in Philippine skies: A history of aviation in the Philippines from 1909 to 1941. Philippine Airlines.

Chicago Style (17. basım) Atıf

Santos, Enrique B. Trails in Philippine Skies: A History of Aviation in the Philippines from 1909 to 1941. Manila: Philippine Airlines, 1981.

MLA (9th ed.) Atıf

Santos, Enrique B. Trails in Philippine Skies: A History of Aviation in the Philippines from 1909 to 1941. Philippine Airlines, 1981.