Teed, Peter, author
Oxford University Press , 1992
Buku Referensi
Nichols, Jeannette P., author
D. Appleton-Century, 1943
Buku Teks
edited by Alexander Baltzly, A. William Salomone
Appleton-Century-Crofts, 1950
Buku Teks
editor, Cameron Hazlehurst
Australian National University Press, 1979
Buku Teks
Gilbert, Martin
Avon books, 1997
Buku Teks