Eckersley, C. (1963). Essential english for foreign students: Book four: teacher's book. Longman Group.
Citace podle Chicago (17th ed.)Eckersley, C.E. Essential English for Foreign Students: Book Four: Teacher's Book. London: Longman Group, 1963.
Citace podle MLA (9th ed.)Eckersley, C.E. Essential English for Foreign Students: Book Four: Teacher's Book. Longman Group, 1963.
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