Allan, David M.
McGraw-Hill, 2008
Buku Teks
Hui, Y.H. (Yiu H.)
Jones and Bartlett , 2010
Buku Teks
Hutagaol, David, examiner
McGraw-Hill Higher Education, 2008
Multimedia
Hutagaol, David, examiner
McGraw-Hill Higher Education, 2008
Multimedia
Hutagaol, David, examiner
McGraw-Hill Higher Education, 2008
Multimedia