@book{mathsarcadebooklet,
    type = "book",
    editor = "Noel-Ann Bradshaw and Peter Rowlett",
    year = "2012",
    title = {Maths Arcade: stretching and supporting mathematical thinking},
    publisher = "Maths, Stats and OR Network",
    address = "Birmingham, U.K.",
    url = "http://www.mathcentre.ac.uk/resources/uploaded/mathsarcade.pdf"
}