Robert Allen, E. (2010). The New Penguin English dictionary. Penguin.
Cita Chicago Style (17a ed.)Robert Allen, Edit. The New Penguin English Dictionary. Penguin, 2010.
Cita MLA (8a ed.)Robert Allen, Edit. The New Penguin English Dictionary. Penguin, 2010.
Precaución: Estas citas no son 100% exactas.