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Follett Publishing Company, 1957
Buku Teks
Sharma, Ram Sharan, author
Macmillan, 1980
Buku Teks
Behavioral Publ., 1971
Buku Teks
Deva, B. C.
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Buku Teks
Feby Rahmawati, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2016
UI - Tesis (Membership)