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Buku Teks
Brian Paltridge, editor; Sue Starfield, editor
Wiley-Blackwell, 2013
Buku Teks
Rangkuti-Hasibuan, Sofia, author
Gramedia, 1986
Buku Teks
Deny Arnos Kwary, author
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UI - Tesis Membership
Smith, Jennifer, author
Macmillan, 1982
Buku Teks