EASTON, L. B. (1981). Express Ways A Basal Language Program Level 6 Lois Brown Easton; Marvin Klein. The Economy Company.
Chicago-viite (17. p.)EASTON, Lois Brown. Express Ways A Basal Language Program Level 6 Lois Brown Easton; Marvin Klein. The Economy Company, 1981.
MLA-viite (8. p.)EASTON, Lois Brown. Express Ways A Basal Language Program Level 6 Lois Brown Easton; Marvin Klein. The Economy Company, 1981.
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