Não informado. (2007). Annual report of the Director of the Board of Trustees. Field Museum of Natural History.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Report of the Director of the Board of Trustees. Chicago, Ill: Field Museum of Natural History, 2007.
Citação MLA (8ª ed.)Não informado. Annual Report of the Director of the Board of Trustees. Field Museum of Natural History, 2007.
警告：這些引文格式不一定是100％准確.