edited by Christine Alavi
Routledge, 1995
Buku Teks
Eide, Arvid R., author
McGraw-Hill, 2002
Buku Teks
Fogler, H. Scott, author
Prentice-Hall, 2008
Buku Teks
edited by Janet Davidson, Robert J. Sternberg
Cambridge university , 2003
Buku Teks
Dayton, C. Mitchell, author
McGraw-Hill, 1971
Buku Teks