Potter, K. D. (1999). Educators guide to finding resources in the public domain. Phi Delta Kappa Educational Foundation.
Tohutoru Kātū Chicago (17th ed.)Potter, Kenyon David. Educators Guide to Finding Resources in the Public Domain. USA: Phi Delta Kappa Educational Foundation, 1999.
Tohutoro MLA (9th ed.)Potter, Kenyon David. Educators Guide to Finding Resources in the Public Domain. Phi Delta Kappa Educational Foundation, 1999.
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