Gaya APA

Coulson, F. et al (1987). Mineral Reconnissance in The Takengon Quadrangle, Aceh Province, Northern Sumatra . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Coulson, F.I.E.. et al. "Mineral Reconnissance in The Takengon Quadrangle, Aceh Province, Northern Sumatra". Bandung: Pusat Sumber Daya Geologi, 1987. Geokimia.