Source: US. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNS13200000
US. Bureau of Labor Statistics, Unemployment Level: Looking for Part-Time Work [LNS13200000], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNS13200000, July 23, 2016.