Dyfyniad APA

Weimer, D. L., & Vining, A. R. (1999). Policy analysis: Concepts and practice. Prentice Hall.

Dyfyniad Arddull Chicago

Weimer, David L., and Aidan R. Vining. Policy Analysis: Concepts and Practice. New Jersey: Prentice Hall, 1999.

Dyfyniad MLA

Weimer, David L., and Aidan R. Vining. Policy Analysis: Concepts and Practice. Prentice Hall, 1999.

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