Dyfyniad APA
(1980). Recreation and leisure: Issues in an era of change. Venture Publishing.
Dyfyniad Arddull Chicago
Recreation and Leisure: Issues in an Era of Change. Pennsylvania: Venture Publishing, 1980.
Dyfyniad MLA
Recreation and Leisure: Issues in an Era of Change. Venture Publishing, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.