APA-viite

Viro, O. (2008). Elementary topology: Problem textbook. American Mathematical Society.

Chicago-tyylinen lähdeviittaus

Viro, O.Ya. Elementary Topology: Problem Textbook. Providence, R.I.: American Mathematical Society, 2008.

MLA-viite

Viro, O.Ya. Elementary Topology: Problem Textbook. American Mathematical Society, 2008.