World of Science. (1995). Energy from sun and atom. Regency Publishing Group.
Cita Chicago (17th ed.)World of Science. Energy from Sun and Atom. Australia: Regency Publishing Group, 1995.
Cita MLA (9th ed.)World of Science. Energy from Sun and Atom. Regency Publishing Group, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.