Davis, R.C., author
Harper & Row, 1951
Buku Teks
Davis, Ralph Currier, author
Harper & Brothers, 1951
Buku Teks
Steiner, George A. (George Albert), 1912-, author
Macmillan, 1969
Buku Teks
Mann, Roland
McGraw-Hill , 1970
Buku Teks
Lewis, James P., author
Amacom, 1997
Buku Teks