APA (7th ed.) Citation

Sica, G. (2006). What is category theory? / Giandomenico Sica, editor. Polimetrica.

Chicago Style (17th ed.) Citation

Sica, Giandomenico. What Is Category Theory? / Giandomenico Sica, Editor. Monza, Italy: Polimetrica, 2006.

MLA (9th ed.) Citation

Sica, Giandomenico. What Is Category Theory? / Giandomenico Sica, Editor. Polimetrica, 2006.

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