APA (7th ed.) Citation

Casas, B. d. l., & O'Gorman, E. (1967). Apologetica historia sumaria ([3. ed.].). [publisher not identified].

Chicago Style (17th ed.) Citation

Casas, Bartolomé de las, and Edmundo O'Gorman. Apologetica Historia Sumaria. [3. ed.]. Mexico: [publisher not identified], 1967.

MLA (9th ed.) Citation

Casas, Bartolomé de las, and Edmundo O'Gorman. Apologetica Historia Sumaria. [3. ed.]. [publisher not identified], 1967.