Browne, Michael E., author
McGraw-Hill, 2010
Buku Teks
Wells, Dare A., author
McGraw-Hill, 1983
Buku Teks
Bolton, William, 1933-, author
Nwenes, 1994
Buku Teks
Potter, Merle C., author
Erlangga, 2011
Buku Teks
Sched, Francis, author
McGraw-Hill International Book Company, 1983
Buku Teks