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London Everyman's Library 1993,
Buku Referensi
edited by Gary R. McClain
McGraw-Hill, 1993
Buku Referensi
Andrea Ratih Dewanti, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Skripsi (Membership)
Newlin, Barbara, author
Osborne/McGraw-Hill, 1985
Buku Teks
Alya Shafira, author
Fakultas Hukum Universitas Indonesia, 2020
UI - Skripsi (Membership)