APA引文

Heady, E. O. (1962). Agricultural policy under economic development. Ames, Iowa, U.S.A: Iowa State University Press.

Trích dẫn kiểu Chicago

Heady, Earl O. Agricultural Policy Under Economic Development. Ames, Iowa, U.S.A: Iowa State University Press, 1962.

MLA引文

Heady, Earl O. Agricultural Policy Under Economic Development. Ames, Iowa, U.S.A: Iowa State University Press, 1962.

警告：这些引文格式不一定是100％准确.