D., G., J. et al.(1987).Microeconomics : private and public choice / James D. Gwartney, Richard L. Stroup, A.H. Studenmund (Ed.ke-4).San Diego:Harcourt Brace Jovanovich.
Gaya MLA
Gwartney, James, D.. et al."Microeconomics : private and public choice / James D. Gwartney, Richard L. Stroup, A.H. Studenmund".Ed.ke-4San Diego:Harcourt Brace Jovanovich,1987.Textbook.