Cita APA (7th ed.)

Bell J. Jan & Gower R. Roger. (1999). Matters. Pre-Intermediate: Students' Book. Longman, 1999.

Cita Chicago (17th ed.)

Bell J. Jan i Gower R. Roger. Matters. Pre-Intermediate: Students' Book. Longman, 1999, 1999.

Cita MLA (9th ed.)

Bell J. Jan i Gower R. Roger. Matters. Pre-Intermediate: Students' Book. Longman, 1999, 1999.