Cita APA (7a ed.)
Littell, J. (1984). Building English skills. McDougal, Littel and Co..
Cita Chicago Style (17a ed.)
Littell, Joy. Building English Skills. New York: McDougal, Littel and Co., 1984.
Cita MLA (9a ed.)
Littell, Joy. Building English Skills. McDougal, Littel and Co., 1984.
Precaución: Estas citas no son 100% exactas.