Cita APA (7th ed.)

Houten, S. v. (1994). Natureboys: Photos / by Stephan van Houten. Janssen.

Cita Chicago (17th ed.)

Houten, Stephan van. Natureboys: Photos / by Stephan Van Houten. Berlin: Janssen, 1994.

Cita MLA (8th ed.)

Houten, Stephan van. Natureboys: Photos / by Stephan Van Houten. Janssen, 1994.