Christensen, Theodore E., author
McGrow-Hill, 2014
Buku Teks
Meigs, Walter B., author
McGraw-Hill, 1983
Buku Teks
Jennings, A.R., author
ELBS, 1993
Buku Teks
Pricewaterhouse coopers, 2011
Buku Referensi
Johnson, Glenn L., author
Prentice-Hall, 1971
Buku Teks