Gaya APA

Aldiss, D. (1983). Geologi lembar Sidikalang, Sumatra = The geology of the Sidikalang Quadrangle, Sumatra . Bandung: Geological Research and Development Center.

Gaya MLA

Aldiss, D.T.. "Geologi lembar Sidikalang, Sumatra = The geology of the Sidikalang Quadrangle, Sumatra". Bandung: Geological Research and Development Center, 1983. Text.