Iowa Columbian Commission. Committee on Archæological, Historical and Statistical Information, Ashton, C., Crosby, J. O., & Jarnagin, J. W. (1893). A hand book of Iowa: Or The discovery, settlement, geographical location, topography, natural resources, geology, climatology, commercial facilities, agricultural productiveness, manufacturing advantages, educational interests, healthfulness, government, and the excellence of the social and moral life of the state of Iowa. The Commission.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Iowa Columbian Commission. Committee on Archæological, Historical and Statistical Information, Charles Ashton, James Ott Crosby, و J. W. Jarnagin. A Hand Book of Iowa: Or The Discovery, Settlement, Geographical Location, Topography, Natural Resources, Geology, Climatology, Commercial Facilities, Agricultural Productiveness, Manufacturing Advantages, Educational Interests, Healthfulness, Government, and the Excellence of the Social and Moral Life of the State of Iowa. [Dubuque]: The Commission, 1893.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Iowa Columbian Commission. Committee on Archæological, Historical and Statistical Information, et al. A Hand Book of Iowa: Or The Discovery, Settlement, Geographical Location, Topography, Natural Resources, Geology, Climatology, Commercial Facilities, Agricultural Productiveness, Manufacturing Advantages, Educational Interests, Healthfulness, Government, and the Excellence of the Social and Moral Life of the State of Iowa. The Commission, 1893.