Benacerraf, P. and Putnam, H. (1983) Philosophy of mathematics: selected readings. 2nd ed. Cambridge: Cambridge University Press. Available at: https://contentstore.cla.co.uk//secure/link?id=60f3fff2-ec40-e911-80cd-005056af4099.
Bostock, D. (2009) Philosophy of mathematics: an introduction. Chichester: Wiley-Blackwell. Available at: https://contentstore.cla.co.uk//secure/link?id=1e8f10e5-ec40-e911-80cd-005056af4099.
Brown, J.R. (2008) Philosophy of mathematics: a contemporary introduction to the world of proofs and pictures. 2nd ed. New York: Routledge. Available at: https://ezproxy.lib.gla.ac.uk/login?url=https://doi.org/10.4324/9780203932964.
George, A. and Velleman, D.J. (2002) Philosophies of mathematics. Malden, MA.: Blackwell Publishers. Available at: https://contentstore.cla.co.uk//secure/link?id=fdb2cedc-ec40-e911-80cd-005056af4099.
Grayling, A.C. (1998) Philosophy. Oxford: Oxford University Press. Available at: https://contentstore.cla.co.uk//secure/link?id=3e3bedd4-ec40-e911-80cd-005056af4099.
Shapiro, S. (2000) Thinking about mathematics: the philosophy of mathematics. New York: Oxford University Press. Available at: https://contentstore.cla.co.uk//secure/link?id=06cf28eb-ec40-e911-80cd-005056af4099.