KELLER, John Esten, Motif-Index of Mediaeval Spanish Exempla, Knoxville, University of Tenessee Press, 1949.

KELLER, John Esten, «Elements of White Magic in Medieval Spanish Exempla», en Romance Studies Presented to Willian Mouton, eds. Urban T. HOLMES, Alfred G. ENGSTROM y Sturgis E. LEAVITT, Chapel Hill, University of North Caroline, 1950, pp. 107-15.

KELLER, John Esten, «Gatos not Quentos», Studies in Philology, 50 (1953), pp. 437-45.

KELLER, John Esten (ed.), El libro de los engaños, Chaepl Hill, University of North Carolina Press, Castalia, 1959.

KELLER, John Esten (ed.), El libro de los engaños, Chapel Hill, Castalia–University of Carolina Press, 1959.

KELLER, John Esten, Alfonso X el Sabio, Nueva York, Twayne, 1967.

KELLER, John Esten, «New Lights on Calila e Digna», en Filología crítica hispánica. Homenaje al profesor Sánchez Escribano, eds. A. PORQUERAS y C. ROJAS, Madrid, Emory University-Ediciones Alcalá, 1969, pp. 25-34.

KELLER, John Esten, «Some Stylistic and Conceptual Differences in Text A and B of El libro de los engaños», en Studia Hispanica in Honorem Rafael Lapesa, Madrid, Gredos, 1975, III, pp. 275-82.

KELLER, John Esten, Pious Brief Narrative in Medieval Castilian and Galician Verse: from Berceo to Alfonso X, Lexington, The University Press of Kentucky, 1978.

KELLER, John Esten, «A Re-examination of Don Juan Manuel's Narrative Techniques: La mujer brava», en Collectanea Hispanica: Folklore and Brief Narrative Studies in honor of J. E. Keller, ed. Dennis P. SENIFT, Delawaqre, Newark, Juan de la Cuesta, 1987, pp. 93-103.