Cita APA (7a ed.)

Downey, R. G., & Greenberg, N. (2020). A hierarchy of Turing degrees: A transfinite hierarchy of lowness notions in the computably enumerable degrees, unifying classes, and natural definability. Princeton University Press.

Cita Chicago Style (17a ed.)

Downey, R. G., y Noam Greenberg. A Hierarchy of Turing Degrees: A Transfinite Hierarchy of Lowness Notions in the Computably Enumerable Degrees, Unifying Classes, and Natural Definability. Princeton: Princeton University Press, 2020.

Cita MLA (8a ed.)

Downey, R. G., y Noam Greenberg. A Hierarchy of Turing Degrees: A Transfinite Hierarchy of Lowness Notions in the Computably Enumerable Degrees, Unifying Classes, and Natural Definability. Princeton University Press, 2020.