APA (7th ed.) Citation

Sacks, G. E. (1966). Degrees of unsolvability (2a. ed.). Princeton University.

Chicago Style (17th ed.) Citation

Sacks, Gerald E. Degrees of Unsolvability. 2a. ed. Princeton: Princeton University, 1966.

MLA (9th ed.) Citation

Sacks, Gerald E. Degrees of Unsolvability. 2a. ed. Princeton University, 1966.