APA

Walsh C. E., . (1979). Worked examples a level: Pure maths. : Celtic Revision Aids, London.

Chicago

Walsh C E, . 1979. Worked examples a level: Pure maths. : Celtic Revision Aids, London.

Harvard

Walsh C. E., . (1979). Worked examples a level: Pure maths. : Celtic Revision Aids, London.

MLA

Walsh C E, . Worked examples a level: Pure maths. : Celtic Revision Aids, London. 1979.