Dyfyniad APA

Goodman, R. E. (1989). Introduction to rock mechanics (2a. ed.). John Wiley and Sons.

Dyfyniad Arddull Chicago

Goodman, Richard E. Introduction to Rock Mechanics. 2a. ed. Nueva York: John Wiley and Sons, 1989.

Dyfyniad MLA

Goodman, Richard E. Introduction to Rock Mechanics. 2a. ed. John Wiley and Sons, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.