Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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