Cita APA (7th ed.)

Voß, P., Hahn, J., & Porsch, P. (1986). Freie Zeit was nun? (o.A.). Dietz.

Cita Chicago (17th ed.)

Voß, Peter, Jochen Hahn, i Peter Porsch. Freie Zeit Was Nun? o.A. Berlin: Dietz, 1986.

Cita MLA (8th ed.)

Voß, Peter, et al. Freie Zeit Was Nun? o.A. Dietz, 1986.