APA استشهاد

Croom, F. H. (1978). Basic concepts of algebraic topology. Springer-Verlag.

استشهاد بنمط شيكاغو

Croom, Fred H. Basic Concepts of Algebraic Topology. New York: Springer-Verlag, 1978.

MLA استشهاد

Croom, Fred H. Basic Concepts of Algebraic Topology. Springer-Verlag, 1978.