APA (7th ed.) Zitazioa

Fitzhugh, P. K. Roy Blakeley: His Story.

Chicago Style (17th ed.) Zitazioa

Fitzhugh, Percy Keese. Roy Blakeley: His Story.

MLA (9th ed.) Zitazioa

Fitzhugh, Percy Keese. Roy Blakeley: His Story.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.