Ballast, David Kent
Professional Publications, 2002
Buku Teks
Ballast, David Kent
Professional Publications, 1999
Buku Teks
Ballast, David Kent
Professional Publications, 2002
Buku Teks
Ballast, David Kent
McGraw-Hill, 1994
Buku Referensi
by Lisa J. Thiemann, ... [et. al.]
McGraw-Hill, 2006
Buku Teks