Lewis, Oscar, author
Universtiy of Washington Press, 1942
Buku Teks
Hayward, Stan
Focal Press, 1984
Buku Teks
Halas, John, Author
Focal Press, 1971
Buku Teks
Fox, David, author
Mc Graw-Hill , 1984
Buku Teks
Weinstock, Neal, author
Addison-Wesley, 1986
Buku Teks