Betts, E. A., & Esterer, L. A. (1941). Directed spelling activities (Glossary ed.). American Book Company.
Citace podle Chicago (17th ed.)Betts, Emmett A., a Louise A. Esterer. Directed Spelling Activities. Glossary ed. [New York ; Cincinnati, etc.]: American Book Company, 1941.
Citace podle MLA (8th ed.)Betts, Emmett A., a Louise A. Esterer. Directed Spelling Activities. Glossary ed. American Book Company, 1941.
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