Alexander L. G. (2000). Longman Advanced Grammar: Reference and Practice. Longman, 2000.
Cita Chicago Style (17a ed.)Alexander L. G. Longman Advanced Grammar: Reference and Practice. Longman, 2000, 2000.
Cita MLA (9a ed.)Alexander L. G. Longman Advanced Grammar: Reference and Practice. Longman, 2000, 2000.
Precaución: Estas citas no son 100% exactas.