Gaya APA

Tansey, M, M., Ziegler, L, F. (1991). The Economy Today : Study Guide to Accompany Schiller (edisi 5). amerika: McGraw Hill.

Gaya MLA

Tansey, Michael, M., Ziegler, Lawrence, F. "The Economy Today : Study Guide to Accompany Schiller". edisi 5 amerika: McGraw Hill, 1991. Text.