APA
Blakerlee L. L., Framingham C. F. & Heady E. O. (1973). World food production, demand and trade. Ames: Iowa State University Press.
Chicago
Blakerlee Leroy L, Framingham Charles F and Heady Earl O. 1973. World food production, demand and trade. Ames: Iowa State University Press.
Harvard
Blakerlee L. L., Framingham C. F. and Heady E. O. (1973). World food production, demand and trade. Ames: Iowa State University Press.
MLA
Blakerlee Leroy L, Framingham Charles F and Heady Earl O. World food production, demand and trade. Ames: Iowa State University Press. 1973.