Παραπομπή σε μορφή APA (7η εκδ.)

Fraenkel, A. A. (1964). Extension of the number-concept: Groups and fields, rational, real, complex, hypercomplex numbers. Scripta Mathematica;, Yeshiva University.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Fraenkel, Abraham Adolf. Extension of the Number-concept: Groups and Fields, Rational, Real, Complex, Hypercomplex Numbers. New York: Scripta Mathematica;, Yeshiva University, 1964.

Παραπομπή σε μορφή MLA (9th εκδ.)

Fraenkel, Abraham Adolf. Extension of the Number-concept: Groups and Fields, Rational, Real, Complex, Hypercomplex Numbers. Scripta Mathematica;, Yeshiva University, 1964.