Gaya APA

RICHARDS, J, C. et al (2013). INTERCHANGE FOURTH EDITION : WORKBOOK 1 (ED 4). ITALY: CAMBRIDGE UNIVERSITY PRESS.

Gaya MLA

RICHARDS, JACK, C.. et al. "INTERCHANGE FOURTH EDITION : WORKBOOK 1". ED 4 ITALY: CAMBRIDGE UNIVERSITY PRESS, 2013. Text.