APA (7th ed.) Zitazioa

Burgess. Fallen Astronauts. University of Nebraska Press.

Chicago Style (17th ed.) Zitazioa

Burgess. Fallen Astronauts. University of Nebraska Press.

MLA (9th ed.) Zitazioa

Burgess. Fallen Astronauts. University of Nebraska Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.