Cita APA (7th ed.)

Horton, T. (1987). GCSE: Examining the new system. Harper & Row.

Cita Chicago (17th ed.)

Horton, Tim. GCSE: Examining the New System. London: Harper & Row, 1987.

Cita MLA (9th ed.)

Horton, Tim. GCSE: Examining the New System. Harper & Row, 1987.