Cita APA (7th ed.)
Littlewood, D. E. (1949). THE SKELETON KEY OF MATHEMATICS (1 ed.). Harper Torchbooks.
Cita Chicago (17th ed.)
Littlewood, D. E. THE SKELETON KEY OF MATHEMATICS. 1 ed. New York: Harper Torchbooks, 1949.
Cita MLA (9th ed.)
Littlewood, D. E. THE SKELETON KEY OF MATHEMATICS. 1 ed. Harper Torchbooks, 1949.
Atenció: Aquestes cites poden no estar 100% correctes.