Langan, J. (1998). Reading and study skills (6th ed.). McGraw-Hill Higher Education.
Citace podle Chicago (17th ed.)Langan, John. Reading and Study Skills. 6th ed. New York, NY : Bostom: McGraw-Hill Higher Education, 1998.
Citace podle MLA (8th ed.)Langan, John. Reading and Study Skills. 6th ed. McGraw-Hill Higher Education, 1998.
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