APA (7th ed.) Citation

Ambos-Spies, K., & Fejer, P. A. (2014). Degrees of unsolvability. Handbook of the history of logic ; 9: Computational logic. https://doi.org/10.1016/B978-0-444-51624-4.50010-1

Chicago Style (17th ed.) Citation

Ambos-Spies, Klaus, and Peter A. Fejer. "Degrees of Unsolvability." Handbook of the History of Logic ; 9: Computational Logic 2014. https://doi.org/10.1016/B978-0-444-51624-4.50010-1.

MLA (9th ed.) Citation

Ambos-Spies, Klaus, and Peter A. Fejer. "Degrees of Unsolvability." Handbook of the History of Logic ; 9: Computational Logic, 2014, https://doi.org/10.1016/B978-0-444-51624-4.50010-1.