Jerrom, M., Szkutnik, L., & Ffolkes, M. (1965). Conversation Exercises in Everyday English (1st ed., 3rd print.). Longmans.
Cita Chicago Style (17a ed.)Jerrom, M.F, L.L Szkutnik, y Michael Ffolkes. Conversation Exercises in Everyday English. 1st ed., 3rd print. London: Longmans, 1965.
Cita MLA (9a ed.)Jerrom, M.F, et al. Conversation Exercises in Everyday English. 1st ed., 3rd print. Longmans, 1965.
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