APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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