Chicago: Noah Webster Jr., "Ittrium," American Dictionary of the English Language, Vol. 1 in An American Dictionary of the English Language, Vol. 1 (New York: S. Converse, 1828), Original Sources, accessed December 6, 2024, http://www.originalsources.com/Document.aspx?DocID=U7YUV92PTFACLRZ.
MLA: Webster, Noah, Jr. "Ittrium." American Dictionary of the English Language, Vol. 1, in An American Dictionary of the English Language, Vol. 1, New York, S. Converse, 1828, Original Sources. 6 Dec. 2024. http://www.originalsources.com/Document.aspx?DocID=U7YUV92PTFACLRZ.
Harvard: Webster, N, 'Ittrium' in American Dictionary of the English Language, Vol. 1. cited in 1828, An American Dictionary of the English Language, Vol. 1, S. Converse, New York. Original Sources, retrieved 6 December 2024, from http://www.originalsources.com/Document.aspx?DocID=U7YUV92PTFACLRZ.