APA引文

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

芝加哥风格引文

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

MLA引文

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