Παραπομπή APA

Napolitano. L. G. (1981). International Astronautical Congress. Pergamon Press.

Παραπομπή Chicago Style

Napolitano. L. G. International Astronautical Congress. Oxford: Pergamon Press, 1981.

Παραπομπή MLA

Napolitano. L. G. International Astronautical Congress. Pergamon Press, 1981.