Dyfyniad APA

Stecher, B. M., Davis, W. A., & Morris, L. L. (1987). How to focus an evaluation. Sage Publications.

Dyfyniad Arddull Chicago

Stecher, Brian M., W. Alan Davis, and Lynn Lyons Morris. How to Focus an Evaluation. Newbury Park, Calif: Sage Publications, 1987.

Dyfyniad MLA

Stecher, Brian M., et al. How to Focus an Evaluation. Sage Publications, 1987.

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