Cita APA (7th ed.)
Collins, G. R. (1973). Overcoming anxiety. Key Publishers.
Cita Chicago (17th ed.)
Collins, Gary R. Overcoming Anxiety. Illinois: Key Publishers, 1973.
Cita MLA (9th ed.)
Collins, Gary R. Overcoming Anxiety. Key Publishers, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.