Thornley, G. C. (1964). Scientific english practice. Longmans, Green and Co.
Cita Chicago (17th ed.)Thornley, G. C. Scientific English Practice. Londres: Longmans, Green and Co, 1964.
Cita MLA (9th ed.)Thornley, G. C. Scientific English Practice. Longmans, Green and Co, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.