Gaya APA

Stamos, T, R, ;, J, S, ;, S. (1982). Economics: a tool for understanding society (ed. 2). USA: Addison-Wesley Publishing.

Gaya MLA

Stamos, Tom, Riddell, ;, Jean, Shackelford, ;, Steve. "Economics: a tool for understanding society". ed. 2 USA: Addison-Wesley Publishing, 1982. Text.