Cita APA (7th ed.)
Morley, S. G. (1933). The Calakmul Expedition.
Cita Chicago (17th ed.)
Morley, Sylvanus Griswold. The Calakmul Expedition. 1933.
Cita MLA (9th ed.)
Morley, Sylvanus Griswold. The Calakmul Expedition. 1933.
Atenció: Aquestes cites poden no estar 100% correctes.