APA
Marshall Cevendish Learning System, . (1970). The world of shape & number : Fundamentals of mathematics. Marshall Cavendish Books, London: .
Chicago
Marshall Cevendish Learning System, . 1970. The world of shape & number : Fundamentals of mathematics. Marshall Cavendish Books, London: .
Harvard
Marshall Cevendish Learning System, . (1970). The world of shape & number : Fundamentals of mathematics. Marshall Cavendish Books, London: .
MLA
Marshall Cevendish Learning System, . The world of shape & number : Fundamentals of mathematics. Marshall Cavendish Books, London: . 1970.