Cita APA (7a ed.)

Wickham, H. (2015). R Packages. O'Reilly.

Cita Chicago Style (17a ed.)

Wickham, Hadley. R Packages. Beijing: O'Reilly, 2015.

Cita MLA (9a ed.)

Wickham, Hadley. R Packages. O'Reilly, 2015.