Cita APA (7a ed.)

Alexander, L. (1970). Practice and progress: Supplementary written exercises. Longman.

Cita Chicago Style (17a ed.)

Alexander, L.G. Practice and Progress: Supplementary Written Exercises. London: Longman, 1970.

Cita MLA (8a ed.)

Alexander, L.G. Practice and Progress: Supplementary Written Exercises. Longman, 1970.