ESTEY, J. A. (1956). Business Cycles Their Nature, Cause And Control James Arthur Estey. Prentice.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रESTEY, James Arthur. Business Cycles Their Nature, Cause And Control James Arthur Estey. Prentice, 1956.
एमएलए (8वां संस्करण) प्रशस्ति पत्रESTEY, James Arthur. Business Cycles Their Nature, Cause And Control James Arthur Estey. Prentice, 1956.
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