Cita APA (7a ed.)

Conrad, J., & O'Prey, P. (1986). Heart of darkness: Joseph Conrad. Ed. with introduction by Paul O'Prey. Penguin Books.

Cita Chicago Style (17a ed.)

Conrad, Joseph, y Paul O'Prey. Heart of Darkness: Joseph Conrad. Ed. with Introduction by Paul O'Prey. Harmondsworth: Penguin Books, 1986.

Cita MLA (8a ed.)

Conrad, Joseph, y Paul O'Prey. Heart of Darkness: Joseph Conrad. Ed. with Introduction by Paul O'Prey. Penguin Books, 1986.