Gaya APA

Wyllie, D, C., Mah, C, W. (1974). Rock Slope Engineering Civil and Mining 4th Edition . New York: The Institution of Mining and Metallurgy.

Gaya MLA

Wyllie, Duncan, C.., Mah, Christopher, W. "Rock Slope Engineering Civil and Mining 4th Edition". New York: The Institution of Mining and Metallurgy, 1974. Text.