Gaya APA

Formby, J, P., Thompson, A, A. (1993). Economics of The Firm: Theory and Practice (6th Ed) (6). New Jersey: Prentice Hall Internasional.

Gaya MLA

Formby, John, P., Thompson, Arthur, A. "Economics of The Firm: Theory and Practice (6th Ed)". 6 New Jersey: Prentice Hall Internasional, 1993. Text.