Cita APA (7th ed.)

Sweeney, E. J. (2007). The Pyramid Age. Algora Pub..

Cita Chicago (17th ed.)

Sweeney, Emmet John. The Pyramid Age. New York: Algora Pub., 2007.

Cita MLA (9th ed.)

Sweeney, Emmet John. The Pyramid Age. Algora Pub., 2007.