APA (7e ed.) Bronvermelding

Lefschetz, S. (1949). Introduction to topology. Princeton university press.

Chicago (17e ed.) Bronvermelding

Lefschetz, Solomon. Introduction to Topology. Princeton (N.J.): Princeton university press, 1949.

MLA (9e ed.) Bronvermelding

Lefschetz, Solomon. Introduction to Topology. Princeton university press, 1949.