Kaufman, Felix
The Ronald Press Co. , 1961
Buku Teks
Hall, James A., author
Thomson/South-Western, 2011
Buku Teks
Cascarino, Richard, author
John Wiley & Sons, 2007
Buku Teks
Weber, Ron, author
McGraw-Hill, 1988
Buku Teks
Hall. James A, author
Thomson/South-Western, 2005
Buku Teks