Cita APA (7th ed.)
Black, M. (1965). The Nature of Mathematics (5a.ed.). Routeledge and Kegan Paul.
Cita Chicago (17th ed.)
Black, Max. The Nature of Mathematics. 5a.ed. Londres: Routeledge and Kegan Paul, 1965.
Cita MLA (9th ed.)
Black, Max. The Nature of Mathematics. 5a.ed. Routeledge and Kegan Paul, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.