S. Munawir, author
BPFE Yogyakarta, 1995
Buku Teks
Kell, Walter G., author
John Wiley & Sons, 1989
Buku Teks
Boynton, William C., author
John Wiley & Sons, 2006
Buku Teks
Silvoso, Joseph A., author
Ohio South-Western, 1965
Buku Teks
Mulyadi, author
Salemba Empat, 2002
Buku Teks