Gaya APA

Bennett, J. (1981). Geologi lembar Langsa, Sumatra = The geology of the Langsa Quadrangle, Sumatra . Bandung: Geological Research and Development Center.

Gaya MLA

Bennett, J.D.. "Geologi lembar Langsa, Sumatra = The geology of the Langsa Quadrangle, Sumatra". Bandung: Geological Research and Development Center, 1981. Text.