Gaya APA

Heilbroner, R, L., Thurow, L, C. (1981). The economic problem : Robert L. Heilbroner, Lester C. Thurow (Ed.ke-6). Jakarta: .

Gaya MLA

Heilbroner, Robert, L.., Thurow, Lester, C.. "The economic problem : Robert L. Heilbroner, Lester C. Thurow". Ed.ke-6 Jakarta: , 1981. Textbook.