Cita APA (7a ed.)
Alexander, L. G. (1987). Practice and Progress 2. An Integrated Course for Pre-Intermediate Students (67 impression.). Longman Group UK.
Cita Chicago Style (17a ed.)
Alexander, Louis George. Practice and Progress 2. An Integrated Course for Pre-Intermediate Students. 67 impression. Harlow: Longman Group UK, 1987.
Cita MLA (9a ed.)
Alexander, Louis George. Practice and Progress 2. An Integrated Course for Pre-Intermediate Students. 67 impression. Longman Group UK, 1987.
Precaución: Estas citas no son 100% exactas.