Crawford, John
Aslib, 2000
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Pantry, Sheila
Facet Publishing, 2005
Buku Teks
Jessy Mahanani Utami
2017
UI - Skripsi (Membership)
Ray, Colin
UNESCO, 1979
Buku Teks
O`Brein, James M.
[publisher not identified], [date of publication not identified]
Artikel Jurnal