Cita APA (7th ed.)
Charles, C. M. (1995). Introduction to educational research (2nd ed.). Longman Publishers USA.
Cita Chicago (17th ed.)
Charles, C. M. Introduction to Educational Research. 2nd ed. White Plains, N.Y.: Longman Publishers USA, 1995.
Cita MLA (9th ed.)
Charles, C. M. Introduction to Educational Research. 2nd ed. Longman Publishers USA, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.