Halbert, M. G., & Worley, O. K. (1941). John raises chickens. published by Bureau of School Service, University of Kentucky, as a part of an experiment in applied economics made possible by a grant from the Alfred P. Sloan Foundation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Halbert, Marie Goodwin, و Opaline King Worley. John Raises Chickens. Lexington, Ky.: published by Bureau of School Service, University of Kentucky, as a part of an experiment in applied economics made possible by a grant from the Alfred P. Sloan Foundation, 1941.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Halbert, Marie Goodwin, و Opaline King Worley. John Raises Chickens. published by Bureau of School Service, University of Kentucky, as a part of an experiment in applied economics made possible by a grant from the Alfred P. Sloan Foundation, 1941.