APA (7th ed.) Citation

Hankinson, R. L., & Hankinson, R. L. (1981). Landman's encyclopedia (2nd ed.). Gulf Pub. Co., Book Division.

Chicago Style (17th ed.) Citation

Hankinson, R. L., and R. L. Hankinson. Landman's Encyclopedia. 2nd ed. Houston: Gulf Pub. Co., Book Division, 1981.

MLA (9th ed.) Citation

Hankinson, R. L., and R. L. Hankinson. Landman's Encyclopedia. 2nd ed. Gulf Pub. Co., Book Division, 1981.