Villegas, B. M. (2004). Economics for the consumer (6th ed.). Sinag-tala Publishers.
Cita Chicago (17th ed.)Villegas, Bernardo M. Economics for the Consumer. 6th ed. Manila: Sinag-tala Publishers, 2004.
Cita MLA (9th ed.)Villegas, Bernardo M. Economics for the Consumer. 6th ed. Sinag-tala Publishers, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.