Kaplan

The Effect of Achievement Goals: Does Level of Perceived Academic Competence Make a Difference?

Kaplan, Midgley, 1997, Contemporary educational psychology.

The Development and Validation of Scales Assessing Students' Achievement Goal Orientations

Eric M. Anderman, Michael J. Middleton, C. Midgley, 1998, Contemporary educational psychology.

Achievement Goals and Student Well-Being.

M. Maehr, Maehr, Kaplan, 1999, Contemporary educational psychology.

Chapter 4. Methodology

S. Kaplan, Kaplan, 2018, Human Cognitive Processing.