Cook, L. B. M. (1941). Adventures in Appreciation. Harcourt, Brace and Company.
Cita Chicago Style (17a ed.)Cook, Luella B.; Miller. Adventures in Appreciation. Chicago, Estados Unidos: Harcourt, Brace and Company, 1941.
Cita MLA (9a ed.)Cook, Luella B.; Miller. Adventures in Appreciation. Harcourt, Brace and Company, 1941.
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