Gaya APA

Chicholm, R., McCarthy, M. (1981). Principles of economics (2nd ed.). Glenview, IL: Scott, Foremand and Co, c.

Gaya MLA

Chicholm, Roger., McCarthy, Marilu. "Principles of economics". 2nd ed. Glenview, IL: Scott, Foremand and Co, c, 1981. Buku Wajib.