Dyfyniad APA

Shenton, J. P., & Meckler, A. M. (1973). Programmed learning aid for United States history. Learning Systems.

Dyfyniad Arddull Chicago

Shenton, James Patrick, and Alan M. Meckler. Programmed Learning Aid for United States History. Homewood, IL: Learning Systems, 1973.

Dyfyniad MLA

Shenton, James Patrick, and Alan M. Meckler. Programmed Learning Aid for United States History. Learning Systems, 1973.

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