Cita APA (7a ed.)
Alexander, L. G. (1990). Longman English Grammar Practice for intermediate students. Longman Group UK.
Cita Chicago Style (17a ed.)
Alexander, Louis George. Longman English Grammar Practice for Intermediate Students. Essex: Longman Group UK, 1990.
Cita MLA (9a ed.)
Alexander, Louis George. Longman English Grammar Practice for Intermediate Students. Longman Group UK, 1990.
Precaución: Estas citas no son 100% exactas.