Chicago: Noah Webster Jr., "Undefeasible," American Dictionary of the English Language, Vol. 2 in An American Dictionary of the English Language, Vol. 2 (New York: S. Converse, 1828), Original Sources, accessed December 13, 2024, http://www.originalsources.com/Document.aspx?DocID=8T6N821IEYIEKEJ.
MLA: Webster, Noah, Jr. "Undefeasible." American Dictionary of the English Language, Vol. 2, in An American Dictionary of the English Language, Vol. 2, New York, S. Converse, 1828, Original Sources. 13 Dec. 2024. http://www.originalsources.com/Document.aspx?DocID=8T6N821IEYIEKEJ.
Harvard: Webster, N, 'Undefeasible' in American Dictionary of the English Language, Vol. 2. cited in 1828, An American Dictionary of the English Language, Vol. 2, S. Converse, New York. Original Sources, retrieved 13 December 2024, from http://www.originalsources.com/Document.aspx?DocID=8T6N821IEYIEKEJ.