Cita APA (7a ed.)
Roys, R. L. (1957). The political geography of the Yucatan maya. Carnegie Institution of Washington.
Cita Chicago Style (17a ed.)
Roys, Ralph Loveland. The Political Geography of the Yucatan Maya. Washington: Carnegie Institution of Washington, 1957.
Cita MLA (9a ed.)
Roys, Ralph Loveland. The Political Geography of the Yucatan Maya. Carnegie Institution of Washington, 1957.
Precaución: Estas citas no son 100% exactas.