Gaya APA

Keys, W, S. (1997). A practical guide to borehole geophysics in environmental investigations (Edisi Pertama). Boca Raton: CRC Press.

Gaya MLA

Keys, W., Scott. "A practical guide to borehole geophysics in environmental investigations". Edisi Pertama Boca Raton: CRC Press, 1997. Text.