Dyfyniad APA

Hamblin, W. K., & Howard, J. D. (1995). Exercises in phyical geology (9th ed.). Prentice-Hall.

Dyfyniad Arddull Chicago

Hamblin, W. Kenneth, and James D. Howard. Exercises in Phyical Geology. 9th ed. Englewood Cliffs, NJ: Prentice-Hall, 1995.

Dyfyniad MLA

Hamblin, W. Kenneth, and James D. Howard. Exercises in Phyical Geology. 9th ed. Prentice-Hall, 1995.

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