Keeves, J. P. (1990). Educational research methodology, and measurement: An international handbook. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Keeves, J. P. Educational Research Methodology, and Measurement: An International Handbook. New York, Estados Unidos: Pergamon Press, 1990.
Lua MLA (9ú heag.)Keeves, J. P. Educational Research Methodology, and Measurement: An International Handbook. Pergamon Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.