APA (7th ed.) Citation

CROOM, F. H. (1928). Basic Concepts of algebraic topology. Springer-Verlag.

Chicago Style (17th ed.) Citation

CROOM, Fred H. Basic Concepts of Algebraic Topology. New- York: Springer-Verlag, 1928.

MLA (9th ed.) Citation

CROOM, Fred H. Basic Concepts of Algebraic Topology. Springer-Verlag, 1928.