Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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