APA (7th ed.) Citation

Forder, H. G., & Genese, R. W. (1960). The calculus of extension. Chelsea Publ..

Chicago Style (17th ed.) Citation

Forder, Henry G., and Robert W. Genese. The Calculus of Extension. New York: Chelsea Publ., 1960.

MLA (9th ed.) Citation

Forder, Henry G., and Robert W. Genese. The Calculus of Extension. Chelsea Publ., 1960.