APA (7th ed.) Citation

Jacobsohn, K., & Mannheim, L. A. (1972). Enlarging (Twenty-first edition.). Focal Press.

Chicago Style (17th ed.) Citation

Jacobsohn, Kurt, and L. A. Mannheim. Enlarging. Twenty-first edition. London ; New York: Focal Press, 1972.

MLA (9th ed.) Citation

Jacobsohn, Kurt, and L. A. Mannheim. Enlarging. Twenty-first edition. Focal Press, 1972.