APA (7th ed.) Citation

Perrin, R. K., Kunnings, K. A., & Ihnen, L. A. (1983). Some effects of the U.S. plant variety protection act of 1970. Dept. of Economics and Business, North Carolina State University.

Chicago Style (17th ed.) Citation

Perrin, Richard K., K. A. Kunnings, and Loren A. Ihnen. Some Effects of the U.S. Plant Variety Protection Act of 1970. Raleigh: Dept. of Economics and Business, North Carolina State University, 1983.

MLA (9th ed.) Citation

Perrin, Richard K., et al. Some Effects of the U.S. Plant Variety Protection Act of 1970. Dept. of Economics and Business, North Carolina State University, 1983.