APA (7th ed.) Citation

Akers, R. E., & Akers, T. J. (1987). Texas Cretaceous echinoids. Paleontology Section, Houston Gem and Mineral Society.

Chicago Style (17th ed.) Citation

Akers, Rosemary E., and Thomas J. Akers. Texas Cretaceous Echinoids. Houston, TX: Paleontology Section, Houston Gem and Mineral Society, 1987.

MLA (9th ed.) Citation

Akers, Rosemary E., and Thomas J. Akers. Texas Cretaceous Echinoids. Paleontology Section, Houston Gem and Mineral Society, 1987.