APA Publications (Firm). (2004). Texas (4th ed., updated.). Apa Publications.
Cita Chicago (17th ed.)APA Publications (Firm). Texas. 4th ed., updated. Singapore: Apa Publications, 2004.
Cita MLA (9th ed.)APA Publications (Firm). Texas. 4th ed., updated. Apa Publications, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.