APA aipamena

Keyhoe, D. E. (1953). Flying saucers from outer space.

Chicago Style aipamena

Keyhoe, Donald E. Flying Saucers from Outer Space. 1953.

MLA aipamena

Keyhoe, Donald E. Flying Saucers from Outer Space. 1953.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.