{{Cite| last1 = Schloerke| first1 = Barret| last2 = Cook| first2 = Di| last3 = Larmarange| first3 = Joseph| last4 = Briatte| first4 = Francois| last5 = Marbach| first5 = Moritz| last6 = Thoen| first6 = Edwin| last7 = Elberg| first7 = Amos| last8 = Toomet| first8 = Ott| last9 = Crowley| first9 = Jason| last10 = Hofmann| first10 = Heike| last11 = Wickham| first11 = Hadley| title = GGally: Extension to 'ggplot2'| access-date = 2021-12-21| date = 2021-06-21| url = https://CRAN.R-project.org/package=GGally}}