Cita APA (7th ed.)

Lefschetz, S. (1942). Algebraic topology. American Mathematical Society.

Cita Chicago (17th ed.)

Lefschetz, Solomon. Algebraic Topology. Nueva York: American Mathematical Society, 1942.

Cita MLA (9th ed.)

Lefschetz, Solomon. Algebraic Topology. American Mathematical Society, 1942.