APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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