Cita APA (7a ed.)

Evans, V. (1999). Round-Up 6: English Grammar Practice. Longman.

Cita Chicago Style (17a ed.)

Evans, Virginia. Round-Up 6: English Grammar Practice. England: Longman, 1999.

Cita MLA (8a ed.)

Evans, Virginia. Round-Up 6: English Grammar Practice. Longman, 1999.