Cita APA (7th ed.)

CHAMBERS HARRY E. (2001). EFFECTIVE COMMUNICATION SKILLS. PERSEUS PUBLICATIONS.

Cita Chicago (17th ed.)

CHAMBERS HARRY E. EFFECTIVE COMMUNICATION SKILLS. CAMBRIDGE: PERSEUS PUBLICATIONS, 2001.

Cita MLA (9th ed.)

CHAMBERS HARRY E. EFFECTIVE COMMUNICATION SKILLS. PERSEUS PUBLICATIONS, 2001.