APA (7th ed.) Citation

Alexandroff, P., & Hopf, H. (1972). Topologie. Chelsea puplishing company.

Chicago Style (17th ed.) Citation

Alexandroff, Paul, and Heinz Hopf. Topologie. New York: Chelsea puplishing company, 1972.

MLA (8th ed.) Citation

Alexandroff, Paul, and Heinz Hopf. Topologie. Chelsea puplishing company, 1972.

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