Lehne, Richard A., author
W.B Sounders, 1998
Buku Teks
Lehne, Richard A., author
W.B. Saunders , 1994
Buku Teks
Wilson, Andrew, author
Brown, 1968
Buku Teks
Hitner, Henry, author
McGraw-Hill, 1999
Buku Teks
Bowman, W.C., author
Blackwell, 1980
Buku Teks