APA (7th ed.) Citation

Yeats, W. B., & Johnson, L. P. (1904). Twenty one poems/ written by Lionel Johnson ; selected by William Butler Yeats. Dun Emer Press.

Chicago Style (17th ed.) Citation

Yeats, W. B., and Lionel Pigot Johnson. Twenty One Poems/ Written by Lionel Johnson ; Selected by William Butler Yeats. Dublin: Dun Emer Press, 1904.

MLA (9th ed.) Citation

Yeats, W. B., and Lionel Pigot Johnson. Twenty One Poems/ Written by Lionel Johnson ; Selected by William Butler Yeats. Dun Emer Press, 1904.

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