(1987). CONCEPTS in use. Oxford University Press.
Cita Chicago Style (17a ed.)CONCEPTS in Use. Londres: Oxford University Press, 1987.
Cita MLA (8a ed.)CONCEPTS in Use. Oxford University Press, 1987.
Precaución: Estas citas no son 100% exactas.
(1987). CONCEPTS in use. Oxford University Press.
Cita Chicago Style (17a ed.)CONCEPTS in Use. Londres: Oxford University Press, 1987.
Cita MLA (8a ed.)CONCEPTS in Use. Oxford University Press, 1987.