editor, James R. Brandon
Cambridge Unipersity Press, 1993
Buku Referensi
Ganzl, Kurt, author
Schirmer Books, 1994
Buku Referensi
Arnold, Stephanie, author
Mayfield Publishing Company, 2001
Buku Teks
Elam, Keir, author
Methuen, 1980
Buku Teks
Cambridge University Press, 2016
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