Cita APA (7a ed.)

BARWICK, J. &. B. (2016). ACTIVE SPELLING - BOOK 2. CAMBRIDGE UNIVERSITY PRESS.

Cita Chicago Style (17a ed.)

BARWICK, JOHN & BARWICK. ACTIVE SPELLING - BOOK 2. DELHI: CAMBRIDGE UNIVERSITY PRESS, 2016.

Cita MLA (9a ed.)

BARWICK, JOHN & BARWICK. ACTIVE SPELLING - BOOK 2. CAMBRIDGE UNIVERSITY PRESS, 2016.