Horner, Chris, author
Cambridge, 2004
Buku Teks
Fisher, Alec, author
Erlangga, 2008
Buku Teks
Randall, John Herman, author
Barnes & Noble, 1957
Buku Teks
Brightman, Edgar Sheffield
Holt, Rinehart and Winston, 1961
Buku Teks
Patrick, George Thomas White, author
George Allen and Unwin, 1925
Buku Teks