Cita APA (7a ed.)
Fowler, W., Pidcock, J., & Rycroft, R. Incentive Themes: Students' Book. Nelson.
Cita estilo Chicago (17a ed.)
Fowler, W.S, John Pidcock, y Robin Rycroft. Incentive Themes: Students' Book. Inglaterra: Nelson.
Cita MLA (9a ed.)
Fowler, W.S, et al. Incentive Themes: Students' Book. Nelson.
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