Cita APA (7th ed.)
Richardson, D. (1977). Lords of the earth. G/L Regal Books.
Cita Chicago (17th ed.)
Richardson, Don. Lords of the Earth. Glendale, Calif.: G/L Regal Books, 1977.
Cita MLA (9th ed.)
Richardson, Don. Lords of the Earth. G/L Regal Books, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.