Wilder, T. (1967). The eighth day. Popular Library.
Cita Chicago (17th ed.)Wilder, Thornton. The Eighth Day. Nueva York: Popular Library, 1967.
Cita MLA (9th ed.)Wilder, Thornton. The Eighth Day. Popular Library, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.