APA (7th ed.) Citation

Yeats, W. (1950). The Collected poems. Macmillan.

Chicago Style (17th ed.) Citation

Yeats, W.B. The Collected Poems. London: Macmillan, 1950.

MLA (9th ed.) Citation

Yeats, W.B. The Collected Poems. Macmillan, 1950.