Riddle, D. F. (1970). Calculus and analytic geometry (2nd ed.). Wadsworth Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRiddle, Douglas F. Calculus and Analytic Geometry. 2nd ed. Belmont, Calif: Wadsworth Publishing, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRiddle, Douglas F. Calculus and Analytic Geometry. 2nd ed. Wadsworth Publishing, 1970.
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