APA aipamena

Heidmann, J. (1995). Extraterrestrial intelligence. Cambridge: Cambridge University Press.

Chicago Style aipamena

Heidmann, Jean. Extraterrestrial Intelligence. Cambridge: Cambridge University Press, 1995.

MLA aipamena

Heidmann, Jean. Extraterrestrial Intelligence. Cambridge: Cambridge University Press, 1995.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.