Logic Colloquium Oxford, England, Association for Symbolic Logic, North Atlantic Treaty Organization, International Union of the History and Philosophy of Science, Symposium on Recursive Functions, Crossley, J. N., & Dummett, M. A. E. (1965). Formal systems and recursive functions: Proceedings. North-Holland Pub. Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Logic Colloquium Oxford, England, Association for Symbolic Logic, North Atlantic Treaty Organization, International Union of the History and Philosophy of Science, Symposium on Recursive Functions, John N. Crossley, و Michael A. E. Dummett. Formal Systems and Recursive Functions: Proceedings. Amsterdam: North-Holland Pub. Co., 1965.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Logic Colloquium Oxford, England, et al. Formal Systems and Recursive Functions: Proceedings. North-Holland Pub. Co., 1965.