Ditchburn, R. (1963). Light. 2nd ed (2nd ed.). International Publishers.
Chicago-viite (17. p.)Ditchburn, R.W. Light. 2nd Ed. 2nd ed. New York: International Publishers, 1963.
MLA-viite (9. p.)Ditchburn, R.W. Light. 2nd Ed. 2nd ed. International Publishers, 1963.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.