Alfuso de Pumares, M. B. (1981). Plain and modern english: For technical schools 4th course.
Citazione stile Chigago Style (17a edizione)Alfuso de Pumares, Martha B. Plain and Modern English: For Technical Schools 4th Course. Buenos Aires, 1981.
Citatione MLA (9a ed.)Alfuso de Pumares, Martha B. Plain and Modern English: For Technical Schools 4th Course. 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.