Não informado. Smithsonian opportunities for research and study in history, art, science. Smithsonian Institution, Board of Academic Studies.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Smithsonian Opportunities for Research and Study in History, Art, Science. Washington: Smithsonian Institution, Board of Academic Studies.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Smithsonian Opportunities for Research and Study in History, Art, Science. Smithsonian Institution, Board of Academic Studies.
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