Rougier, Harry, author
W.W. Norton, 1970
Buku Teks
Lesikar, Raymond V. (Raymond Vincent), author
Dow Jones-Irwin , 1974
Buku Teks
Weisman, Herman M.
Charles E. Merrill Publishing Company, 1980
Buku Teks
Churchill Livingstone, 2003
Buku Teks
Sigband, Norman B.
Harper & Brothers Publ , 1960
Buku Teks