APA (7e ed.) Bronvermelding
Helvarg, D. (2005). The Ocean and Costal Conservation Guide: The Blue Movement Directory. OISLAND PRESS.
Chicago (17e ed.) Bronvermelding
Helvarg, David. The Ocean and Costal Conservation Guide: The Blue Movement Directory. Washington DC: OISLAND PRESS, 2005.
MLA (9e ed.) Bronvermelding
Helvarg, David. The Ocean and Costal Conservation Guide: The Blue Movement Directory. OISLAND PRESS, 2005.
Let op: Deze citaties zijn niet altijd 100% accuraat.