Cita APA (7th ed.)

Gangstad, J. E. (1980). The Great Pyramid: Signs in the sun : supplement. Di-Tri Books.

Cita Chicago (17th ed.)

Gangstad, John E. The Great Pyramid: Signs in the Sun : Supplement. Madison, Wis.: Di-Tri Books, 1980.

Cita MLA (8th ed.)

Gangstad, John E. The Great Pyramid: Signs in the Sun : Supplement. Di-Tri Books, 1980.