Cunningham, Lawrence
BlackWell, 2004
Buku Teks
Buck, Pearl Sydenstricker, 1892-1973
A. Signet Book, 1971
Buku Teks
Missler, Chuck
Visimedia, 2006
Buku Teks
Jenney, Ray Freeman
Harper and Brothers , 1955
Buku Teks
Ehrlich, J. W.
Oceana Publications, 1962
Buku Teks