Cita APA (7a ed.)

Eilenberg, S., & Elgot, C. C. (1970). Recursiveness. [S.n.].

Cita Chicago Style (17a ed.)

Eilenberg, Samuel, y Calvin C. Elgot. Recursiveness. Nueva York: [S.n.], 1970.

Cita MLA (9a ed.)

Eilenberg, Samuel, y Calvin C. Elgot. Recursiveness. [S.n.], 1970.