Gaya APA

Principles of economics / Karl E. Case ; Ray C. Fair ; Sharon M. Oster. (1970). Upper Saddle River, NJ: Prentice-Hall, c.

Gaya MLA

Principles of economics / Karl E. Case ; Ray C. Fair ; Sharon M. Oster. 9th ed.. Upper Saddle River, NJ: Prentice-Hall, c, 1970. Buku Wajib.