Schaefer, H. H., & Martin, P. L. (1975). Behavioral therapy (2d ed.). McGraw-Hill.
Cita Chicago (17th ed.)Schaefer, Halmuth H., i Patrick L. Martin. Behavioral Therapy. 2d ed. New York: McGraw-Hill, 1975.
Cita MLA (9th ed.)Schaefer, Halmuth H., i Patrick L. Martin. Behavioral Therapy. 2d ed. McGraw-Hill, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.