Robinson, N. M., & Robinson, H. B. (1976). The mentally retarded child : a psychological approach / [by] Nancy M. Robinson, Halbert B. Robinson, with contributions by Gilbert S. Omenn... [et al.]: A psychological approach (2nd ed.). McGraw-Hill.
Chicago Style (17th ed.) CitationRobinson, Nancy Mayer, and Halbert Benefiel Robinson. The Mentally Retarded Child : A Psychological Approach / [by] Nancy M. Robinson, Halbert B. Robinson, with Contributions by Gilbert S. Omenn... [et Al.]: A Psychological Approach. 2nd ed. New York ; London (etc.): McGraw-Hill, 1976.
MLA (9th ed.) CitationRobinson, Nancy Mayer, and Halbert Benefiel Robinson. The Mentally Retarded Child : A Psychological Approach / [by] Nancy M. Robinson, Halbert B. Robinson, with Contributions by Gilbert S. Omenn... [et Al.]: A Psychological Approach. 2nd ed. McGraw-Hill, 1976.