APA (7th ed.) Citation

Hart, J. C. (2016). Visualization of non-numerical data: Introduction. University of Illinois.

Chicago Style (17th ed.) Citation

Hart, John C. Visualization of Non-numerical Data: Introduction. [Champaign, Illinois]: University of Illinois, 2016.

MLA (9th ed.) Citation

Hart, John C. Visualization of Non-numerical Data: Introduction. University of Illinois, 2016.