Зохиогч: Curtis, Michael;
Kommers, Donald P;
Reshetar, Jr. John S;
Blondel, Jean;
McNelly, Theodore;
Seymour, James D;
Brown, Bernard E;
Needler, Martin;
Wright, Stephen.
Дахин хэвлэлт: 2nd edition Гаралтын мэдээ: New York, N.Y HarperCollins College Publishers 1990
