Παραπομπή APA

Krouwel, B. (2003). Outdoor training: A source book of activites. Viva Books.

Παραπομπή Chicago Style

Krouwel, Bill. Outdoor Training: A Source Book of Activites. New Delhi: Viva Books, 2003.

Παραπομπή MLA

Krouwel, Bill. Outdoor Training: A Source Book of Activites. Viva Books, 2003.