Citazione Stile APA (7a Edizione)

ebrary, Inc, Tweeten, L. G., & Thompson, S. R. (2002). Agricultural policy for the 21st century. Iowa State Press.

Citazione stile Chigago Style (17a edizione)

ebrary, Inc, Luther G. Tweeten, e Stanley R. Thompson. Agricultural Policy for the 21st Century. Ames: Iowa State Press, 2002.

Citatione MLA (9a ed.)

ebrary, Inc, et al. Agricultural Policy for the 21st Century. Iowa State Press, 2002.