Cita APA

Allen, J. P. B. 1., & Widdowson, H. G. 1. (1974). English in physical science: Teacher's edition. London: Oxford University Press.

Citación estilo Chicago

Allen, J. P. B. 1936-, and H. G. 1935- Widdowson. English in Physical Science: Teacher's Edition. London: Oxford University Press, 1974.

Cita MLA

Allen, J. P. B. 1936-, and H. G. 1935- Widdowson. English in Physical Science: Teacher's Edition. London: Oxford University Press, 1974.