APA (7th ed.) Citation

Keats, J. (1947). The letters of John Keats (3. ed. with revisions and add. letters.). Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Keats, John. The Letters of John Keats. 3. ed. with revisions and add. letters. London: Oxford Univ. Press, 1947.

MLA (9th ed.) Citation

Keats, John. The Letters of John Keats. 3. ed. with revisions and add. letters. Oxford Univ. Press, 1947.