APA-viite (7. p.)
Willey, G. R., & Smith, L. (1969). The ruins of Altar de Sacrificios, department of Peten, Guatemala: An introduction. The Peabody Museum.
Chicago-viite (17. p.)
Willey, Gordon R., ja Ledyard Smith. The Ruins of Altar De Sacrificios, Department of Peten, Guatemala: An Introduction. Cambridge, Massachusetts: The Peabody Museum, 1969.
MLA-viite (9. p.)
Willey, Gordon R., ja Ledyard Smith. The Ruins of Altar De Sacrificios, Department of Peten, Guatemala: An Introduction. The Peabody Museum, 1969.
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