Gaya APA

Diulio, D, S, A, E, A. (2003). Schaum’s easy outlines principles of economics : based on schaum’s outline of theory and problems of principles of economics (Second edition). New York: McGraw-Hill.

Gaya MLA

Diulio, Dominick, Salvatore,, And, Eugene, A.. "Schaum’s easy outlines principles of economics : based on schaum’s outline of theory and problems of principles of economics". Second edition New York: McGraw-Hill, 2003. Electronic Resource.