Cita APA (7th ed.)

WARD, J. M. (1972). Practice in structure and usage for Intermediate students. Longman.

Cita Chicago (17th ed.)

WARD, J. Millington. Practice in Structure and Usage for Intermediate Students. London: Longman, 1972.

Cita MLA (9th ed.)

WARD, J. Millington. Practice in Structure and Usage for Intermediate Students. Longman, 1972.