APA (7th ed.) Citation

Grayson, H. (1967). This world: The unified field theory of the universe. Crossroads Book Gallery.

Chicago Style (17th ed.) Citation

Grayson, Henry. This World: The Unified Field Theory of the Universe. Honolulu: Crossroads Book Gallery, 1967.

MLA (9th ed.) Citation

Grayson, Henry. This World: The Unified Field Theory of the Universe. Crossroads Book Gallery, 1967.