Gaya APA

Widyatmoko,, D. (1998). The Flora of Bukit Tigapuluh National Park Kerumutan Sanctuary and Mahato Protective Reserve Riau-Indonesia . Indonesian: Indonesian Botanic Gardens.

Gaya MLA

Widyatmoko,, Didik. "The Flora of Bukit Tigapuluh National Park Kerumutan Sanctuary and Mahato Protective Reserve Riau-Indonesia". Indonesian: Indonesian Botanic Gardens, 1998. Text.