APA (7th ed.) Citation
Willey, G. R., & Smith, L. (1969). The ruins of Altar de Sacrificios, department of Peten, Guatemala: An introduction. The Peabody Museum.
Chicago Style (17th ed.) Citation
Willey, Gordon R., and Ledyard Smith. The Ruins of Altar De Sacrificios, Department of Peten, Guatemala: An Introduction. Cambridge, Massachusetts: The Peabody Museum, 1969.
MLA (9th ed.) Citation
Willey, Gordon R., and Ledyard Smith. The Ruins of Altar De Sacrificios, Department of Peten, Guatemala: An Introduction. The Peabody Museum, 1969.
Warning: These citations may not always be 100% accurate.