APA (7th ed.) Citation

Yeats, W. B., Allt, P., & Alspach, R. K. (1957). The variorum edition of the poems of W. B. Yeats. MacMillan.

Chicago Style (17th ed.) Citation

Yeats, W. B., Peter Allt, and Russell K. Alspach. The Variorum Edition of the Poems of W. B. Yeats. New York: MacMillan, 1957.

MLA (9th ed.) Citation

Yeats, W. B., et al. The Variorum Edition of the Poems of W. B. Yeats. MacMillan, 1957.