Gaya APA

Principles of economics / Karl E. Case ; Ray C. Fair. (1968). Upper Saddle River, NJ: Prentice-Hall, c.

Gaya MLA

Principles of economics / Karl E. Case ; Ray C. Fair. 8th ed.. Upper Saddle River, NJ: Prentice-Hall, c, 1968. Buku Wajib.