Cita APA (7th ed.)

MURRELL, P. (2011). R GRAPHICS (2ND ED.). CRC PRESS.

Cita Chicago (17th ed.)

MURRELL, PAUL. R GRAPHICS. 2ND ED. BOCA RATON: CRC PRESS, 2011.

Cita MLA (9th ed.)

MURRELL, PAUL. R GRAPHICS. 2ND ED. CRC PRESS, 2011.