Dyfyniad APA

Alkin, M. C. (2013). Evaluation roots: A wider perspective of theorists' views and influences (2nd ed.). SAGE Publications.

Dyfyniad Arddull Chicago

Alkin, Marvin C. Evaluation Roots: A Wider Perspective of Theorists' Views and Influences. 2nd ed. Los Angeles: SAGE Publications, 2013.

Dyfyniad MLA

Alkin, Marvin C. Evaluation Roots: A Wider Perspective of Theorists' Views and Influences. 2nd ed. SAGE Publications, 2013.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.