Cita APA (7th ed.)

Sacks, G. E. (1963). Degrees of unsolvability. Princeton University Press.

Cita Chicago (17th ed.)

Sacks, Gerald E. Degrees of Unsolvability. Princeton, N.J: Princeton University Press, 1963.

Cita MLA (9th ed.)

Sacks, Gerald E. Degrees of Unsolvability. Princeton University Press, 1963.