APA (7 वां संस्करण) प्रशस्ति पत्र
Camp, W. G., & Heath-Camp, B. (2016). Workbook to accompany managing our natural resources (6th ed.). Cengage Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Camp, William G., और Betty Heath-Camp. Workbook to Accompany Managing Our Natural Resources. 6th ed. United States: Cengage Learning, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Camp, William G., और Betty Heath-Camp. Workbook to Accompany Managing Our Natural Resources. 6th ed. Cengage Learning, 2016.
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