(2006). Prentice Hall science explorer. Learning Solutions, Prentice Hall.
Cita Chicago (17th ed.)Prentice Hall Science Explorer. New York : Boston: Learning Solutions, Prentice Hall, 2006.
Cita MLA (8th ed.)Prentice Hall Science Explorer. Learning Solutions, Prentice Hall, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.