Cite
Opper Project : using editorial cartoons to teach history
MLA
Not Available. "Opper Project : using editorial cartoons to teach history." Cartoon Research Library (Ohio State University). 2017/, http://hti.osu.edu/opper.
APA
Not Available (2017/). Opper Project : using editorial cartoons to teach history. Retrieved from http://hti.osu.edu/opper
Chicago
Not Available. "Opper Project : using editorial cartoons to teach history." 2017/. May 1, 2024. http://hti.osu.edu/opper.