Cita APA (7th ed.)

Moore, P. (1977). Guide to comets (Completely revised and new ed.). Lutterworth Press.

Cita Chicago (17th ed.)

Moore, Patrick. Guide to Comets. Completely revised and new ed. Guildford: Lutterworth Press, 1977.

Cita MLA (8th ed.)

Moore, Patrick. Guide to Comets. Completely revised and new ed. Lutterworth Press, 1977.