Yorkey, R. C. (1970). Study skills for students of english as a second language. McGraw-Hill.
Citace podle Chicago (17th ed.)Yorkey, Richard C. Study Skills for Students of English as a Second Language. Nueva York: McGraw-Hill, 1970.
Citace podle MLA (9th ed.)Yorkey, Richard C. Study Skills for Students of English as a Second Language. McGraw-Hill, 1970.
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