Dyfyniad APA

Rossi, P. H., & Freeman, H. E. (1985). Evaluation: A systematic approach (3rd ed.). Sage.

Dyfyniad Arddull Chicago

Rossi, Peter H., and Howard E. Freeman. Evaluation: A Systematic Approach. 3rd ed. Beverly Hills: Sage, 1985.

Dyfyniad MLA

Rossi, Peter H., and Howard E. Freeman. Evaluation: A Systematic Approach. 3rd ed. Sage, 1985.

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