Cita APA (7a ed.)

Malins, E. G., & Purkis, J. A. (1994). A preface to Yeats (2nd. ed. / revisions and additional material by John Purkis.). Longman.

Cita Chicago Style (17a ed.)

Malins, Edward Greenway, y John Arthur Purkis. A Preface to Yeats. 2nd. ed. / revisions and additional material by John Purkis. London [etc.]: Longman, 1994.

Cita MLA (9a ed.)

Malins, Edward Greenway, y John Arthur Purkis. A Preface to Yeats. 2nd. ed. / revisions and additional material by John Purkis. Longman, 1994.