APA aipamena

(2008). 50 fifty Years of space: A global perspective. Universities Press.

Chicago Style aipamena

50 Fifty Years of Space: A Global Perspective. Universities Press, 2008.

MLA aipamena

50 Fifty Years of Space: A Global Perspective. Universities Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.