Richardson, E. P., & Richardson, E. P. (1972). Stamp act cartoons in the colonies. The Pennsylvania magazine of history and biography, 96(3), pp. 275-297.

Richardson, Edgar Preston, و Edgar Preston Richardson. "Stamp Act Cartoons in the Colonies." The Pennsylvania Magazine of History and Biography 96, no. 3 (1972): 275-297.

Richardson, Edgar Preston, و Edgar Preston Richardson. "Stamp Act Cartoons in the Colonies." The Pennsylvania Magazine of History and Biography 96.3 (1972): 275-297.