APA (7th ed.) Citation

Gram, M. S. (1983). Direct realism: A study of perception. Nijhoff.

Chicago Style (17th ed.) Citation

Gram, Moltke S. Direct Realism: A Study of Perception. The Hague u.a: Nijhoff, 1983.

MLA (9th ed.) Citation

Gram, Moltke S. Direct Realism: A Study of Perception. Nijhoff, 1983.