Cita APA (7th ed.)
Coe, W. R. (1959). Piedras Negras Archaeology: Artifacts, Caches, and Burials. University of Pennsylvania, University Museum.
Cita Chicago (17th ed.)
Coe, William R. Piedras Negras Archaeology: Artifacts, Caches, and Burials. Filadelfia, EUA: University of Pennsylvania, University Museum, 1959.
Cita MLA (9th ed.)
Coe, William R. Piedras Negras Archaeology: Artifacts, Caches, and Burials. University of Pennsylvania, University Museum, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.