Gaya APA

Economics / Richard G. Lipsey ; Paul N. Courant ; Christopher Ragan. (2001). Reading, MA: Addison-Wesley, c.

Gaya MLA

Economics / Richard G. Lipsey ; Paul N. Courant ; Christopher Ragan. 12th ed.. Reading, MA: Addison-Wesley, c, 2001. Buku Wajib.