Hays, William Lee, 1926-1995
Harcourt Brace Colege, 1994
Buku Teks
McClave, James T.
Dellen Publishing, 1985
Buku Teks
McClave, James T.
Pearson, 2017
Buku Teks
McClave, James T.
Prentice-Hall, 2000
Buku Teks
Book, Stephen A.
McGraw-Hill, 1978
Buku Teks