Cita APA (7th ed.)

(2009). ErgoMed. Haefner.

Cita Chicago (17th ed.)

ErgoMed. Heidelberg: Haefner, 2009.

Cita MLA (8th ed.)

ErgoMed. Haefner, 2009.

Atenció: Aquestes cites poden no estar 100% correctes.