Hart, A. D. (1989). Overcoming anxiety. Word.
Cita Chicago (17th ed.)Hart, Archibald D. Overcoming Anxiety. Word, 1989.
Cita MLA (9th ed.)Hart, Archibald D. Overcoming Anxiety. Word, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)