APA
Bieniawski Z., . (1989). Engineering rock mass classifications : a complete manual for engineers and geologists in mining, civil, and petroleum engineering. New York, N.Y: Wiley.
Chicago
Bieniawski Z.T, . 1989. Engineering rock mass classifications : a complete manual for engineers and geologists in mining, civil, and petroleum engineering. New York, N.Y: Wiley.
Harvard
Bieniawski Z., . (1989). Engineering rock mass classifications : a complete manual for engineers and geologists in mining, civil, and petroleum engineering. New York, N.Y: Wiley.
MLA
Bieniawski Z.T, . Engineering rock mass classifications : a complete manual for engineers and geologists in mining, civil, and petroleum engineering. New York, N.Y: Wiley. 1989.