APA (7th ed.) Citation

Purkis, J. (1970). A preface to Wordsworth / John Purkis. Longman.

Chicago Style (17th ed.) Citation

Purkis, John. A Preface to Wordsworth / John Purkis. Harlow: Longman, 1970.

MLA (9th ed.) Citation

Purkis, John. A Preface to Wordsworth / John Purkis. Longman, 1970.

Warning: These citations may not always be 100% accurate.