Dyfyniad APA

Freeman, H. E., Jones, W. C., & Zucker, L. G. (1979). Social problems: A policy perspective. Rand McNally.

Dyfyniad Arddull Chicago

Freeman, Howard E., Wyatt C. Jones, and Lynne G. Zucker. Social Problems: A Policy Perspective. Chicago: Rand McNally, 1979.

Dyfyniad MLA

Freeman, Howard E., et al. Social Problems: A Policy Perspective. Rand McNally, 1979.

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