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UI - Tesis Membership
Hasan Basri Jumin, author
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Buku Teks
Pearson, Lorentz C.
Reinhold Publishing Corporation, 1967
Buku Teks
Supraptono Djajadirana, author
Jakarta : Grafindo Persada, 2000,
Buku Referensi
Puri Listiyani, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Tesis Membership