Ehrlich, E. H. (1987). Schaum's outline of theory and problems of punctuation, capitalization, and spelling (Second edition.). McGraw-Hill.
Citace podle Chicago (17th ed.)Ehrlich, Eugene H. Schaum's Outline of Theory and Problems of Punctuation, Capitalization, and Spelling. Second edition. New York: McGraw-Hill, 1987.
Citace podle MLA (9th ed.)Ehrlich, Eugene H. Schaum's Outline of Theory and Problems of Punctuation, Capitalization, and Spelling. Second edition. McGraw-Hill, 1987.
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