APA-Zitierstil (7. Ausg.)

Ward, D. C. (1967). Geologic reference sources. Univ. of Colorado Press.

Chicago-Zitierstil (17. Ausg.)

Ward, Dederick C. Geologic Reference Sources. Boulder, Colo: Univ. of Colorado Press, 1967.

MLA-Zitierstil (9. Ausg.)

Ward, Dederick C. Geologic Reference Sources. Univ. of Colorado Press, 1967.