Dyfyniad APA

O'Riordan, T., & Sewell, W. R. D. (1981). Project appraisal and policy review. John Wiley.

Dyfyniad Arddull Chicago

O'Riordan, Timothy, and W. R. Derrick Sewell. Project Appraisal and Policy Review. Chichester: John Wiley, 1981.

Dyfyniad MLA

O'Riordan, Timothy, and W. R. Derrick Sewell. Project Appraisal and Policy Review. John Wiley, 1981.

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