ESTEY, J. A. (1956). Business Cycles Their Nature, Cause And Control James Arthur Estey. Prentice.
Lua i Stíl Chicago (17ú heag.)ESTEY, James Arthur. Business Cycles Their Nature, Cause And Control James Arthur Estey. Prentice, 1956.
Lua MLA (8ú heag.)ESTEY, James Arthur. Business Cycles Their Nature, Cause And Control James Arthur Estey. Prentice, 1956.
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