Gaya APA

, ., Fragiadakis, H, K. (1998). All clear ! intro: speaking, listening, expressions, and pronunciation in context . Boston: Boston: Heinle & Heinle, 1998.

Gaya MLA

, ., Fragiadakis, Helen, Kalkstein. "All clear ! intro: speaking, listening, expressions, and pronunciation in context". Boston: Boston: Heinle & Heinle, 1998, 1998. .