Nigel Buckle. Mathematics Higher Level Core (IB Mathematics) (4th edition.). IBID Press.
Cita Chicago (17th ed.)Nigel Buckle. Mathematics Higher Level Core (IB Mathematics). 4th edition. IBID Press.
Cita MLA (9th ed.)Nigel Buckle. Mathematics Higher Level Core (IB Mathematics). 4th edition. IBID Press.
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