Rude, George
Harper Torchbooks, 1964
Buku Teks
David Parker, editor
Routledge, 2000
Buku Teks
Waten, Judah
Angus and Robertson Publishers, 1982
Buku Teks
Carter, Jimmy, author
Simon & Schuster, 2003
Buku Teks
Freeborn, Richard, author
Cambridge University Press, 1985
Buku Teks