Gaya APA

Brue, C, R, M, ;, S, L. (1990). Economics: principles, problems, and policies (ed. 10,11). USA: McGraw-Hill.

Gaya MLA

Brue, Campbell, R., McConnell, ;, Stanley, L.. "Economics: principles, problems, and policies". ed. 10,11 USA: McGraw-Hill, 1990. Text.