Vasta, R. (1992). Six theories of child development: Revised formulations and current issues. J. Kingsley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVasta, Ross. Six Theories of Child Development: Revised Formulations and Current Issues. London: J. Kingsley, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVasta, Ross. Six Theories of Child Development: Revised Formulations and Current Issues. J. Kingsley, 1992.
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