Gaya APA

Skinner, B, J., Permana, . (1984). Sumber daya bumi . : Yogyakarta.Gadjah Mada University Press.

Gaya MLA

Skinner, Brian, J., Permana, . "Sumber daya bumi". : Yogyakarta.Gadjah Mada University Press, 1984. Koleksi Elektronik.