Clarke de Armando, R. (1965). English for Commercial Schools (7a.ed.). Angel Estrada.
Chicago-čujuhus (17. p.)Clarke de Armando, Rosa. English for Commercial Schools. 7a.ed. Buenos Aires: Angel Estrada, 1965.
MLA-čujuhus (9. p.)Clarke de Armando, Rosa. English for Commercial Schools. 7a.ed. Angel Estrada, 1965.
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