Daudistel, Howard C., author
Holt, Rinehart and Winston, 1979
Buku Teks
Daudistel, Howard C., author
Holt, Rine hart and Winston, 1979
Buku Teks
Samaha, Joel, author
West Publishing, 1988
Buku Teks
Regoli, Robert M., author
Jones and Bartlett Publishers, 2010
Buku Teks
Davis, Frederick T, author
Cambridge University Press, 2019
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