APA

Wollersheim Shervey S., Sandilos L. E., DiPerna J. C. & Lei P. (20180514). Social validity of the Social Skills Improvement System-Classwide Intervention Program (SSIS-CIP) in the primary grades. : School psychology quarterly : the official journal of the Division of School Psychology, American Psychological Association.

Chicago

Wollersheim Shervey Sarah, Sandilos Lia E, DiPerna James C and Lei Pui-Wa. 20180514. Social validity of the Social Skills Improvement System-Classwide Intervention Program (SSIS-CIP) in the primary grades. : School psychology quarterly : the official journal of the Division of School Psychology, American Psychological Association.

Harvard

Wollersheim Shervey S., Sandilos L. E., DiPerna J. C. and Lei P. (20180514). Social validity of the Social Skills Improvement System-Classwide Intervention Program (SSIS-CIP) in the primary grades. : School psychology quarterly : the official journal of the Division of School Psychology, American Psychological Association.

MLA

Wollersheim Shervey Sarah, Sandilos Lia E, DiPerna James C and Lei Pui-Wa. Social validity of the Social Skills Improvement System-Classwide Intervention Program (SSIS-CIP) in the primary grades. : School psychology quarterly : the official journal of the Division of School Psychology, American Psychological Association. 20180514.