APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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