Wellek, R., & Nichols, S. G. (1965). Concepts of criticism: René Wellek. Ed. and with an introduction by Stephen G. Nichols (3. print.). Yale Univ. Press.

Wellek, René, and Stephen G. Nichols. Concepts of Criticism: René Wellek. Ed. and with an Introduction by Stephen G. Nichols. 3. print. New Haven ; London: Yale Univ. Press, 1965.

Wellek, René, and Stephen G. Nichols. Concepts of Criticism: René Wellek. Ed. and with an Introduction by Stephen G. Nichols. 3. print. Yale Univ. Press, 1965.