APA (7th ed.) Citation

Troug, E., Chapman, C. J., & Graul, E. J. (1944). Ammonium nitrate for early abundant pastures.

Chicago Style (17th ed.) Citation

Troug, Emil, Christopher John Chapman, and E. J. Graul. Ammonium Nitrate for Early Abundant Pastures. Madison, 1944.

MLA (9th ed.) Citation

Troug, Emil, et al. Ammonium Nitrate for Early Abundant Pastures. 1944.