Meier, Gerald M., author
Harper & Row, 1968
Buku Teks
King, Philip, author
McGraww-Hill, 1990
Buku Teks
King, Philip, author
McGraw-Hill , 1995
Buku Teks
Ethier, Wilferd J.
W.W. Norton & Company , 1988
Buku Teks
Vaish, M.C.
Oxford & IBH Pub. Co., 1988
Buku Teks