Παραπομπή σε μορφή APA (7η εκδ.)

Littlewood, D. E. (1949). The skeleton key of mathematics: A simple account of complex algebraic theories. Hutchinson University Library.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Littlewood, Dudley Ernest. The Skeleton Key of Mathematics: A Simple Account of Complex Algebraic Theories. London: Hutchinson University Library, 1949.

Παραπομπή σε μορφή MLA (9th εκδ.)

Littlewood, Dudley Ernest. The Skeleton Key of Mathematics: A Simple Account of Complex Algebraic Theories. Hutchinson University Library, 1949.