Wooldridge, Jeffrey M., 1960-
South-Western College, 2000
Buku Teks SO
Ramanathan, Ramu
Orlandno Harcourt Brace Jovanovich College, 1992
Buku Teks SO
Teh-Wei, Hu
University Park Press, 1982
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Brooks, Chris
Cambridge University Press, 2019
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Verbeek, Marno
John Wiley & Sons, 2012
Buku Teks SO