Center, S. S., & Persons, G. L. (1941). Teachers' manual and key to workbook, Problems in reading and thinking. The Macmillan Company.
Citace podle Chicago (17th ed.)Center, Stella S., a Gladys L. Persons. Teachers' Manual and Key to Workbook, Problems in Reading and Thinking. New York: The Macmillan Company, 1941.
Citace podle MLA (8th ed.)Center, Stella S., a Gladys L. Persons. Teachers' Manual and Key to Workbook, Problems in Reading and Thinking. The Macmillan Company, 1941.
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