APA aipamena

John Langan. (2004). Sentence skills, form B. A workbook for writers.

Chicago Style aipamena

John Langan. Sentence Skills, Form B. A Workbook for Writers. 2004.

MLA aipamena

John Langan. Sentence Skills, Form B. A Workbook for Writers. 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.