APA (7th ed.) Citation

Ward, D. C., Wheeler, M. W., & Bier, R. A. (1981). Geologic reference sources: A subject and regional bibliography of publications and maps in the geological sciences (2nd ed.). Scarecrow Press.

Chicago Style (17th ed.) Citation

Ward, Dederick C., Marjorie W. Wheeler, and Robert A. Bier. Geologic Reference Sources: A Subject and Regional Bibliography of Publications and Maps in the Geological Sciences. 2nd ed. Metuchen, N.J: Scarecrow Press, 1981.

MLA (9th ed.) Citation

Ward, Dederick C., et al. Geologic Reference Sources: A Subject and Regional Bibliography of Publications and Maps in the Geological Sciences. 2nd ed. Scarecrow Press, 1981.