Kellough, R. D. (1997). A resource guide for teaching: K-12 (2nd ed.). Prentice-Hall.
Cita Chicago (17th ed.)Kellough, Richard D. A Resource Guide for Teaching: K-12. 2nd ed. New Jersey: Prentice-Hall, 1997.
Cita MLA (8th ed.)Kellough, Richard D. A Resource Guide for Teaching: K-12. 2nd ed. Prentice-Hall, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.