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Buku Teks
Else, Perry, author
Mc Graw Hill, 2014
Buku Teks
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Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2012
UI - Tesis Membership
Seach, Diana, author
Routledge , 2007
Buku Teks
Oktaviana Prayudhani, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Tesis Membership