APA (7th ed.) Citation

Piña Chán, R., & Navarrete, C. (1967). Archeological research in the lower Grijalva River region, Tabasco and Chiapas. [publisher not identified].

Chicago Style (17th ed.) Citation

Piña Chán, Román, and Carlos Navarrete. Archeological Research in the Lower Grijalva River Region, Tabasco and Chiapas. Provo, Utah: [publisher not identified], 1967.

MLA (9th ed.) Citation

Piña Chán, Román, and Carlos Navarrete. Archeological Research in the Lower Grijalva River Region, Tabasco and Chiapas. [publisher not identified], 1967.