Παραπομπή APA

Harry, H. R. D., & Stefanko, R. (1973). New horizons in rock mechanics [proceedings]. American society of Civil Engineers.

Παραπομπή Chicago Style

Harry, H Reginald D., και Robert Stefanko. New Horizons in Rock Mechanics [proceedings]. New York: American society of Civil Engineers, 1973.

Παραπομπή MLA

Harry, H Reginald D., και Robert Stefanko. New Horizons in Rock Mechanics [proceedings]. American society of Civil Engineers, 1973.