APA (7 वां संस्करण) प्रशस्ति पत्र
Winter, R. D. (1994). Global civilization foundations covering the time frame from creation to 400BC: Study guide. William Carey Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Winter, Ralph D. Global Civilization Foundations Covering the Time Frame from Creation to 400BC: Study Guide. California: William Carey Library, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Winter, Ralph D. Global Civilization Foundations Covering the Time Frame from Creation to 400BC: Study Guide. William Carey Library, 1994.
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