APA

Sivakugan N. e., .Rock Mechanics an introduction. New York :CRC press ,2013: .

Chicago

Sivakugan Nagaratnam ect, .Rock Mechanics an introduction. New York :CRC press ,2013: .

Harvard

Sivakugan N. e., .Rock Mechanics an introduction. New York :CRC press ,2013: .

MLA

Sivakugan Nagaratnam ect, .New York :CRC press ,2013: . .