Nekrasov, B., author
Peace, 1965
Buku Teks
Burman, Harold G., author
Allyn and Bacon, 1968
Buku Teks
Will, John W., author
Prentice-Hall, 2002
Buku Teks
Silberberg, Martin S., author
McGraw-Hill, 2003
Buku Teks
Silberberg, Martin S., author
McGraw-Hill, 2003
Buku Teks