Cita APA (7a ed.)

Shoenfield, J. R. (1971). Degrees of unsolvability. North-Holland Pub. Co..

Cita Chicago Style (17a ed.)

Shoenfield, Joseph Robert. Degrees of Unsolvability. Amsterdam ; London: North-Holland Pub. Co., 1971.

Cita MLA (8a ed.)

Shoenfield, Joseph Robert. Degrees of Unsolvability. North-Holland Pub. Co., 1971.