APA (7th ed.) Citation

Yeats, W. B., Frayne, J. P., & Johnson, C. (1970). Uncollected prose. Macmillan.

Chicago Style (17th ed.) Citation

Yeats, W. B., John P. Frayne, and Cotton Johnson. Uncollected Prose. London: Macmillan, 1970.

MLA (8th ed.) Citation

Yeats, W. B., et al. Uncollected Prose. Macmillan, 1970.