APA (7 वां संस्करण) प्रशस्ति पत्र
Howes, C., Unger, O., & Matheson, C. C. (1992). The collaborative construction of pretend: Social pretend play functions. State University of New York Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Howes, Carollee, Olivia Unger, और Catherine C. Matheson. The Collaborative Construction of Pretend: Social Pretend Play Functions. Albany: State University of New York Press, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Howes, Carollee, et al. The Collaborative Construction of Pretend: Social Pretend Play Functions. State University of New York Press, 1992.
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