Williams, C. C., & Schneider, F. (2016). Measuring the global shadow economy: The prevalence of informal work and labour. Edward Elgar Publishing.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Williams, Colin C., ба Friedrich Schneider. Measuring the Global Shadow Economy: The Prevalence of Informal Work and Labour. Cheltenham, UK ; Northampton, MA, USA: Edward Elgar Publishing, 2016.
MLA -ийн эшлэл (9 дэх хэвлэлт)Williams, Colin C., ба Friedrich Schneider. Measuring the Global Shadow Economy: The Prevalence of Informal Work and Labour. Edward Elgar Publishing, 2016.