Doernberg, Richard L., author
West , 1993
Buku Teks
James R. Hines, edited
The University of Chicago Press, 2001
Buku Teks
Postlewaite, Philip F., author
McGraw-Hill, 1980
Buku Teks
Westberg, Bjorn
IBFD, 2002
Buku Teks
Richard D Irwin, 1988
Buku Teks