Cita APA (7th ed.)
Engelhart, M. D. (1972). Methods of educational research. Rand McNally.
Cita Chicago (17th ed.)
Engelhart, Max Dissette. Methods of Educational Research. Chicago: Rand McNally, 1972.
Cita MLA (9th ed.)
Engelhart, Max Dissette. Methods of Educational Research. Rand McNally, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.