Penguin, 1958
Koleksi Publik
Forcese, Dennis P., author
McGraw-Hill Ryerson, 1980
Buku Teks
edited by Robert Weaver
Oxford University Press, 1981
Buku Teks
general editor, William Toye
Oxford University Press, 1983
Buku Referensi
edited by J.A. Kraulis
Hurtig, 1980
Buku Teks