Chicago: Noah Webster Jr., "Unscrew," 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 March 31, 2023, http://www.originalsources.com/Document.aspx?DocID=85E5WIG75CDDK29.
MLA: Webster, Noah, Jr. "Unscrew." 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. 31 Mar. 2023. http://www.originalsources.com/Document.aspx?DocID=85E5WIG75CDDK29.
Harvard: Webster, N, 'Unscrew' 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 31 March 2023, from http://www.originalsources.com/Document.aspx?DocID=85E5WIG75CDDK29.