APA (7th ed.) Citation

Yeats, W. B. (1906). [Letter from William Butler Yeats to William George Fay].

Chicago Style (17th ed.) Citation

Yeats, W. B. [Letter from William Butler Yeats to William George Fay]. 1906.

MLA (9th ed.) Citation

Yeats, W. B. [Letter from William Butler Yeats to William George Fay]. 1906.

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