APA aipamena

Purkis, J. (1970). Preface to WordsWorth. Longman.

Chicago Style aipamena

Purkis, John. Preface to WordsWorth. England: Longman, 1970.

MLA aipamena

Purkis, John. Preface to WordsWorth. Longman, 1970.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.