Source: U.S. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU02600000
U.S. Bureau of Labor Statistics, Employed, Usually Work Part Time [LNU02600000], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNU02600000, February 23, 2018.