Cita APA (7a ed.)

Blake, W., & Keynes, G. S. (1968). The letters of William Blake. Harvard University Press.

Cita Chicago Style (17a ed.)

Blake, William, y Geoffrey Sir Keynes. The Letters of William Blake. Cambridge, Mass: Harvard University Press, 1968.

Cita MLA (9a ed.)

Blake, William, y Geoffrey Sir Keynes. The Letters of William Blake. Harvard University Press, 1968.