APA (7 ম সংস্করণ) উদ্ধৃতি

Keyhoe, D. E. (1954). Flying saucers from outer space: By Donald E. Keyhoe (1st print.). Permabooks.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Keyhoe, Donald E. Flying Saucers from Outer Space: By Donald E. Keyhoe. 1st print. Garden City, NY: Permabooks, 1954.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Keyhoe, Donald E. Flying Saucers from Outer Space: By Donald E. Keyhoe. 1st print. Permabooks, 1954.