Nigel Buckle. Mathematics Higher Level Core (IB Mathematics) (4th edition.). IBID Press.
Chicago-referens (17:e uppl.)Nigel Buckle. Mathematics Higher Level Core (IB Mathematics). 4th edition. IBID Press.
MLA-referens (9:e uppl.)Nigel Buckle. Mathematics Higher Level Core (IB Mathematics). 4th edition. IBID Press.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.