Dyfyniad APA

(1981). Journal of planning education and research. Sage Publications.

Dyfyniad Arddull Chicago

Journal of Planning Education and Research. Thousand Oaks, California: Sage Publications, 1981.

Dyfyniad MLA

Journal of Planning Education and Research. Sage Publications, 1981.

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