APA (7th ed.) Citation

Butler, M., Oebker, N., & Oebker, N. F. (1990). Watermelon Variety Trial, 1989. College of Agriculture, University of Arizona (Tucson, AZ).

Chicago Style (17th ed.) Citation

Butler, Marvin, Norm Oebker, and Norman F. Oebker. Watermelon Variety Trial, 1989. College of Agriculture, University of Arizona (Tucson, AZ), 1990.

MLA (8th ed.) Citation

Butler, Marvin, et al. Watermelon Variety Trial, 1989. College of Agriculture, University of Arizona (Tucson, AZ), 1990.