APA-referens (7:e uppl.)

Windham, D. M. (1990). Improving the Efficiency of Educational Systems Project.: Indicators of educational effectiveness and efficiency. IEES.

Chicago-referens (17:e uppl.)

Windham, Doughlas M. Improving the Efficiency of Educational Systems Project.: Indicators of Educational Effectiveness and Efficiency. Tallahassee, Fla., USA: IEES, 1990.

MLA-referens (8:e uppl.)

Windham, Doughlas M. Improving the Efficiency of Educational Systems Project.: Indicators of Educational Effectiveness and Efficiency. IEES, 1990.

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