Morgan, Theodore
Prentice-Hall, 1948
Buku Teks
Collery, Arnold
John Wiley & Sons, 1970
Buku Teks
Schneider, Erich
George Allen and Unwin, 1963
Buku Teks
Peterson, Wallace C.
W.W. Norton & Co., 1962
Buku Teks
Gupta, Syamaprasad
The Johns Hopkins University Press, 1977
Buku Teks