Cita APA (7th ed.)
Curtis, A. (1983). Primary certificate English test. Oxford.
Cita Chicago (17th ed.)
Curtis, Arnold. Primary Certificate English Test. Nairobi: Oxford, 1983.
Cita MLA (9th ed.)
Curtis, Arnold. Primary Certificate English Test. Oxford, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.