APA aipamena

O'Connell, S. (1996). Focus on first certificate for revised exam. [New York]: Longman.

Chicago Style aipamena

O'Connell, Sue. Focus On First Certificate for Revised Exam. [New York]: Longman, 1996.

MLA aipamena

O'Connell, Sue. Focus On First Certificate for Revised Exam. [New York]: Longman, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.