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eBooks
Indonesia. Departemen Perhubungan
Departemen Perhubungan, 2000
Buku Referensi
Dewberry and Davis, author
McGraw-Hill, 1996
Buku Referensi
Dimas Ismail, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2021
UI - Tesis (Membership)
Fischbach, Frances Talaska, author
F.A. Davis Company, 1991
Buku Teks