Não informado. (1888). Bulletin from the Laboratories of Natural History of the State University of Iowa. University of Iowa.
Citação do estilo Chicago (17ª ed.)Não informado. Bulletin from the Laboratories of Natural History of the State University of Iowa. Iowa City, Iowa: University of Iowa, 1888.
Citação MLA (8ª ed.)Não informado. Bulletin from the Laboratories of Natural History of the State University of Iowa. University of Iowa, 1888.
警告：這些引文格式不一定是100％准確.