APA ציטוט

Frank, R. H. (2007). Principles of economics. Boston: McGraw-Hill/Irwin.

Trích dẫn kiểu Chicago

Frank, Robert H. Principles of Economics. Boston: McGraw-Hill/Irwin, 2007.

ציטוט MLA

Frank, Robert H. Principles of Economics. Boston: McGraw-Hill/Irwin, 2007.