by Peter Cabena [and others]
Prentice-Hall, 1998
Buku Teks
Chapman, Robert D., author
W.H. Freeman, 1978
Buku Teks
Jefferys, William H., author
John Wiley & Sons, 1981
Buku Teks
Hutton, Wendy, author
Opus Publications Sdn Bhd, 2007
Buku Referensi
Yohana Nessy Christiana, author
PT Gramedia, 2022
Buku Teks SO