Zill, D. G. (2001). A first course in differential equations with modeling applications (7th edition.). Brooks/Cole Thomson Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZill, Dennis G. A First Course in Differential Equations with Modeling Applications. 7th edition. Pacific Grove, CA: Brooks/Cole Thomson Learning, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZill, Dennis G. A First Course in Differential Equations with Modeling Applications. 7th edition. Brooks/Cole Thomson Learning, 2001.
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