APA aipamena

Langan, J. (2005). College Writing Skill. McGraw Hill Companies Inc.

Chicago Style aipamena

Langan, John. College Writing Skill. McGraw Hill Companies Inc, 2005.

MLA aipamena

Langan, John. College Writing Skill. McGraw Hill Companies Inc, 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.