Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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