Wallace, A. H. (1957). An introduction to Algebraic Topology (1a. ed.). Pergamon Press.
Cita Chicago (17th ed.)Wallace, Andrew H. An Introduction to Algebraic Topology. 1a. ed. Oxford: Pergamon Press, 1957.
Cita MLA (9th ed.)Wallace, Andrew H. An Introduction to Algebraic Topology. 1a. ed. Pergamon Press, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.