Bryce, Murray D., author
McGraw-Hill, 1960
Buku Teks
Johnson, Harry G., author
George Allen and Unwin, 1958
Buku Teks
Wilson, Charles, author
Cassell, 1970
Buku Teks
Ohkawa, Kazushi, author
Stanford University Press, 1973
Buku Teks
Clarendon Press, 1994
Buku Teks