Voe, Merrill De, author
Prentice-Hall, 1957
Buku Teks
Hughes, G. David, author
Addison-Wesley, 1983
Buku Teks
Stroh, Thomas F., author
McGraw-Hill, 1978
Buku Teks
Quelsch, John A., author
Prentice-Hall, 1989
Buku Teks
Quelch, John A., author
Prentice-Hall, 1989
Buku Teks