Halbert, M. G., & Worley, O. K. (1941). Kinds of chickens. University of Kentucky, Bureau of School Service.
Citace podle Chicago (17th ed.)Halbert, Marie Goodwin, a Opaline King Worley. Kinds of Chickens. [Lexington, Ky.]: University of Kentucky, Bureau of School Service, 1941.
Citace podle MLA (8th ed.)Halbert, Marie Goodwin, a Opaline King Worley. Kinds of Chickens. University of Kentucky, Bureau of School Service, 1941.
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