Gaya APA

Legget, R, F., Hatheway, A, W. (1988). Geology and Engineering (Edisi Ketiga). Singapura: McGraw-Hill Book Company.

Gaya MLA

Legget, Robert, F., Hatheway, Allen, W. "Geology and Engineering". Edisi Ketiga Singapura: McGraw-Hill Book Company, 1988. Text.