Cita APA (7a ed.)

Lewis, C. S., & Hooper, W. (1987). The dark tower and other stories. Collins.

Cita Chicago Style (17a ed.)

Lewis, C. S., y Walter Hooper. The Dark Tower and Other Stories. London: Collins, 1987.

Cita MLA (9a ed.)

Lewis, C. S., y Walter Hooper. The Dark Tower and Other Stories. Collins, 1987.