Brown, J. R. (1999). Philosophy of mathematics: an introduction to: The world of proofs and pictures. Routledge.
Citazione stile Chigago Style (17a edizione)Brown, James Robert. Philosophy of Mathematics: An Introduction to: The World of Proofs and Pictures. London: Routledge, 1999.
Citatione MLA (9a ed.)Brown, James Robert. Philosophy of Mathematics: An Introduction to: The World of Proofs and Pictures. Routledge, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.