Goldhor, H. (1981). Fact Book of the American Public Library. Occasional Papers Number 150.
Citazione stile Chigago Style (17a edizione)Goldhor, Herbert. Fact Book of the American Public Library. Occasional Papers Number 150. 1981.
Citatione MLA (9a ed.)Goldhor, Herbert. Fact Book of the American Public Library. Occasional Papers Number 150. 1981.
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