APA Style

GIESEN, W. (1991). Wetlands of Giam-Siak kecil wildlife reserve, Riau, Sumatra: survey report . : Asian Wetland Bureau-Indonesia.

MLA Style

GIESEN, Wim. "Wetlands of Giam-Siak kecil wildlife reserve, Riau, Sumatra: survey report". : Asian Wetland Bureau-Indonesia, 1991. Electronic resources.