Gaya APA

Moore, P., Mason, J. (New York: WW Norton). The return of halley's comet . New York: WW Norton Company; 1: New York: WW Norton Company; 1984.

Gaya MLA

Moore, Patrick., Mason, John. "The return of halley's comet". New York: WW Norton Company; 1: New York: WW Norton Company; 1984, New York: WW Norton. Text.