APA Style
GIESEN, W. (1991).
Bakung island, Riau (Pulau Bakung, Pulau Basu): survey report .
:
Asian Wetland Bureau-Indonesia.
MLA Style
GIESEN, Wim.
"Bakung island, Riau (Pulau Bakung, Pulau Basu): survey report".
:
Asian Wetland Bureau-Indonesia,
1991.
Electronic resources.