Raghavan, V.
Prentice-Hall, 1981
Buku Teks
Raghavan, V.
Prentice Hall of India, 1996
Buku Teks
Edited by: D.M. Dunlop, L.S.P. Davidson, Sir John McNee
E & S Livingstone, 1953
Buku Teks
Jernigan, Dale Kayser, author
Appleton-Century-Crofts , 1983
Buku Teks
Orem, Dorothea E., author
McGraw-Hill , 1985
Buku Teks