Cita APA (7th ed.)
Kirschenbaum, H. The Life and Work of Carl Rogers. PCCS Books.
Cita Chicago (17th ed.)
Kirschenbaum, Howard. The Life and Work of Carl Rogers. Herefordshire, Inglaterra: PCCS Books.
Cita MLA (9th ed.)
Kirschenbaum, Howard. The Life and Work of Carl Rogers. PCCS Books.
Atenció: Aquestes cites poden no estar 100% correctes.