Schultz, F. (1998). Annual editions: Education 98/99 (25th ed.). Dushkin/McGraw-Hill.
Cita Chicago (17th ed.)Schultz, Fred. Annual Editions: Education 98/99. 25th ed. Guilford, Conn.: Dushkin/McGraw-Hill, 1998.
Cita MLA (8th ed.)Schultz, Fred. Annual Editions: Education 98/99. 25th ed. Dushkin/McGraw-Hill, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.