Harlan, J. D., & Rivkin, M. S. (2000). Science experiences for the early childhood years: An integrated approach (7th ed.). Merrill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHarlan, Jean Durgin, और Mary S. Rivkin. Science Experiences for the Early Childhood Years: An Integrated Approach. 7th ed. Upper Saddle River, N.J: Merrill, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHarlan, Jean Durgin, और Mary S. Rivkin. Science Experiences for the Early Childhood Years: An Integrated Approach. 7th ed. Merrill, 2000.
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