Tappan, William T., author
McGraw-Hill, 1992
Buku Referensi
Brueggeman, William B., author
McGraw-Hill Irwin, 2011
Buku Teks
Michael Mutze
Springer, 2012
eBooks
editor, Joseph L. Pagliari
Irwin, 1996
Buku Referensi
Wendt, Paul Francis, author
McGraw-Hill, 1979
Buku Teks