APA (7th ed.) Citation

Artin, E., & Hemmingsen, E. (1969). Introduction to algebraic topology. Charles E. Merrill.

Chicago Style (17th ed.) Citation

Artin, Emil, and Erik Hemmingsen. Introduction to Algebraic Topology. Columbus, Ohio: Charles E. Merrill, 1969.

MLA (8th ed.) Citation

Artin, Emil, and Erik Hemmingsen. Introduction to Algebraic Topology. Charles E. Merrill, 1969.

Warning: These citations may not always be 100% accurate.