Não informado. Smithsonian opportunities for research and study in history, art, science. Smithsonian Institution, Board of Academic Studies.
Citação do estilo Chicago (17ª ed.)Não informado. Smithsonian Opportunities for Research and Study in History, Art, Science. Washington: Smithsonian Institution, Board of Academic Studies.
Citação MLA (8ª ed.)Não informado. Smithsonian Opportunities for Research and Study in History, Art, Science. Smithsonian Institution, Board of Academic Studies.
警告：這些引文格式不一定是100％准確.