APA aipamena

Marshak, S., & Prothero, D. R. Earth: Portrait of a planet.

Chicago Style aipamena

Marshak, Stephen, and Donald R. Prothero. Earth: Portrait of a Planet.

MLA aipamena

Marshak, Stephen, and Donald R. Prothero. Earth: Portrait of a Planet.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.