Chandos , 2015
eBooks
O`Brien, James A., 1936-, author
McGraw-Hill , 1999
Buku Teks
Tan, Joseph, author
Jones and Bartlett Publishers,, 2010
Buku Teks
Weaver, Barbara N., author
John Wiley & Sons, 1974
Buku Teks
Parker, C.C. (Christopher Charles), author
Butterworths, 1986
Buku Teks