Langer, J., & Killen, M. (1998). Piaget, evolution, and development. L. Erlbaum Associates.
Chicago Style (17th ed.) CitationLanger, Jonas, and Melanie Killen. Piaget, Evolution, and Development. Mahwah, N.J.: L. Erlbaum Associates, 1998.
MLA (8th ed.) CitationLanger, Jonas, and Melanie Killen. Piaget, Evolution, and Development. L. Erlbaum Associates, 1998.
Warning: These citations may not always be 100% accurate.