APA (7th ed.) Citation

Medina, R. G. (2003). Principles of economics. Rex Books Store, Inc.

Chicago Style (17th ed.) Citation

Medina, Roberto G. Principles of Economics. Sampaloc, Manila: Rex Books Store, Inc, 2003.

MLA (9th ed.) Citation

Medina, Roberto G. Principles of Economics. Rex Books Store, Inc, 2003.