Krouwel, B. (1999). Outdoor training: A sourcebook of activities for management trainers. Viva.
Chicago-referens (17:e uppl.)Krouwel, Bill. Outdoor Training: A Sourcebook of Activities for Management Trainers. New delhi: Viva, 1999.
MLA-referens (9:e uppl.)Krouwel, Bill. Outdoor Training: A Sourcebook of Activities for Management Trainers. Viva, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.