Butter, H. (1849). The scholar's companion: Containing exercises in the orthography, derivation, and classification of English words (84th ed.). Henry Perkins.
Citace podle Chicago (17th ed.)Butter, Henry. The Scholar's Companion: Containing Exercises in the Orthography, Derivation, and Classification of English Words. 84th ed. Philadelphia: Henry Perkins, 1849.
Citace podle MLA (8th ed.)Butter, Henry. The Scholar's Companion: Containing Exercises in the Orthography, Derivation, and Classification of English Words. 84th ed. Henry Perkins, 1849.
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