Pile, John F.
McGraw-Hil, 1997
Buku Teks
Pilatowicz, Grazyna, author
John Wiley & Sons, 1994
Buku Referensi
Rayfield, Julie K.
John Wiley & Sons, 1994
Buku Teks
Pile, John F.
Wiley, 2000
Buku Teks
edited by Mark Taylor and Julieanna Preston
John Wiley & Sons, 2008
Buku Teks