Siahaan, Elisabeth I.P., author
2002
UI - Tesis (Membership)
Dess, Gregory G., author
McGraw-Hill/Irwin, 2004
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Dess, Gregory G., author
MCGraw-Hill , 2004
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Glueck, William F., author
McGraw-Hill, 1984
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Iskandar Zulkarnaen, author
Puslit. Kemasyarakatan dan Kebudayaan LIPI, 2004
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