APA (7th ed.) Citation

Wickham, H. (2009). ggplot2: Elegant Graphics for Data Analysis. Springer New York.

Chicago Style (17th ed.) Citation

Wickham, Hadley. Ggplot2: Elegant Graphics for Data Analysis. New York, NY: Springer New York, 2009.

MLA (8th ed.) Citation

Wickham, Hadley. Ggplot2: Elegant Graphics for Data Analysis. Springer New York, 2009.

Warning: These citations may not always be 100% accurate.