Experimental Methodology
by Larry B. Christensen
ISBN 13: 9780205263653
Format: Hardcover (590 pages) Publisher: Pearson Education Published: 22 Oct 1996
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Educational Research: Quantitative, Qualitative, and Mixed Approaches
by Larry B. Christensen, R. (Robert) Burke Johnson
ISBN 13: 9781412954563
Format: Hardcover (664 pages) Publisher: Sage Publications, Inc Published: 26 Feb 2008