APA استشهاد

Ragan, D. M. (1973). Structural geology: An introduction to geometrical techniques (2nd ed.). Wiley Eastern.

استشهاد بنمط شيكاغو

Ragan, Donal M. Structural Geology: An Introduction to Geometrical Techniques. 2nd ed. New York: Wiley Eastern, 1973.

MLA استشهاد

Ragan, Donal M. Structural Geology: An Introduction to Geometrical Techniques. 2nd ed. Wiley Eastern, 1973.