APA (7th ed.) Citation

Shafer, B. A., Marshall, D. S., & Tuleen, N. A. (1990). Genotype mixtures for control of leaf rust of wheat.

Chicago Style (17th ed.) Citation

Shafer, Brian Andrew, David S. Marshall, and Neal A. Tuleen. Genotype Mixtures for Control of Leaf Rust of Wheat. 1990.

MLA (9th ed.) Citation

Shafer, Brian Andrew, et al. Genotype Mixtures for Control of Leaf Rust of Wheat. 1990.