APA استشهاد

Hellan, K. (1985). Introduction to fracture mechanics. Mc Graw - Hill.

استشهاد بنمط شيكاغو

Hellan, Kare. Introduction to Fracture Mechanics. New York: Mc Graw - Hill, 1985.

MLA استشهاد

Hellan, Kare. Introduction to Fracture Mechanics. Mc Graw - Hill, 1985.