Prytherch, Ray
Gower, 2000
Buku Referensi
compiled by Ray Prytherch
Gower, 1990
Buku Referensi
Harrod, Leonard Montague
England : Gower Pub, 1987,
Buku Referensi
Muljani A. Nurhadi
Andi, 1983
Buku Teks
Gorman, Michael
[American Library association;American Library association, American Library association], 2005
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