Keeves, J. P. (1990). Educational research methodology, and measurement: An international handbook. Pergamon Press.
Chicago-čujuhus (17. p.)Keeves, J. P. Educational Research Methodology, and Measurement: An International Handbook. New York, Estados Unidos: Pergamon Press, 1990.
MLA-čujuhus (9. p.)Keeves, J. P. Educational Research Methodology, and Measurement: An International Handbook. Pergamon Press, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.