Key, V. O. (Valdimer Orlando), 1908-1963, author
Thomas Y. Crowell, 1954
Buku Teks
Walpole, Ronald E., author
Prentice-Hall, 1998
Buku Teks
Walpole, Ronald E., author
Macmillan, 1972
Buku Teks
Walpole, Ronald E., author
Prentice-Hall, 1993
Buku Teks
Navidi, william, author
McGraw-Hill, 2010
Buku Teks