Gaya APA

Helvarg, , D. (2005). The Ocean and Coastal Conservation Guide 2005-2006 . : Island.Washington, D.C..

Gaya MLA

Helvarg, , David. "The Ocean and Coastal Conservation Guide 2005-2006". : Island.Washington, D.C., 2005. Skripsi, Tesis, Disertasi.