Gaya APA

Brinkgreve, F., Sulistianingsih, R. (2009). Sumatra: crossroads of cultures . Leiden: KITLV Press.

Gaya MLA

Brinkgreve, Francine., Sulistianingsih, Retno. "Sumatra: crossroads of cultures". Leiden: KITLV Press, 2009. Textbook.