APA-referens (7:e uppl.)

Modgil, S., & Modgil, C. (1976). Piagetian research: Compilation and commentary. NFER.

Chicago-referens (17:e uppl.)

Modgil, Sohan, och Celia Modgil. Piagetian Research: Compilation and Commentary. Windsor, Eng: NFER, 1976.

MLA-referens (9:e uppl.)

Modgil, Sohan, och Celia Modgil. Piagetian Research: Compilation and Commentary. NFER, 1976.