Παραπομπή σε μορφή APA (7η εκδ.)

Bieniawski, Z. T. (1989). Engineering rock mass classifications: A complete manual for engineers and geologists in mining, civil and petroleum engineering. Wiley and Sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bieniawski, Z. T. Engineering Rock Mass Classifications: A Complete Manual for Engineers and Geologists in Mining, Civil and Petroleum Engineering. New York: Wiley and Sons, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Bieniawski, Z. T. Engineering Rock Mass Classifications: A Complete Manual for Engineers and Geologists in Mining, Civil and Petroleum Engineering. Wiley and Sons, 1989.