Elton, G. R. (Geoffrey Rudolph), author
Harper & Row, 1963
Buku Teks
Hollister, C. Warren, author
John Wiley & Sons, 1968
Buku Teks
Fennell, John
Longman, 1983
Buku Teks
Steane, John
Routledge, 1999
Buku Teks
Ennen, Edith
North-Holland Publishing, 1979
Buku Teks