APA (7th ed.) Citation

Roberts, B. C., & Roberts, E. C. (1992). Blades of grass: Speaking out on the environment. The Lawn Institute.

Chicago Style (17th ed.) Citation

Roberts, Beverly C., and Eliot C. Roberts. Blades of Grass: Speaking Out on the Environment. [Pleasant Hill, Tenn.]: The Lawn Institute, 1992.

MLA (9th ed.) Citation

Roberts, Beverly C., and Eliot C. Roberts. Blades of Grass: Speaking Out on the Environment. The Lawn Institute, 1992.