1. Global Estimates of Modern Slavery: Forced Labour and Forced Marriage (International Labor Organization & Walk Free Foundation, 2018).
2. Sustainable Development Goals Knowledge Platform (United Nations, 2020).
3. The Meanings of Forced Labour (International Labor Organization, 2014); https://www.ilo.org/global/topics/forced-labour/news/WCMS_237569/lang--en/index.htm
4. Allain, J., Crane, A., LeBaron, G. & Behbahani, L. Forced Labour’s Business Models and Supply Chains (JRF, 2013); https://www.jrf.org.uk/sites/default/files/jrf/migrated/files/forced-labour-business-full.pdf
5. LeBaron, G., Howard, N., Thibos, C. & Kyritsis, P. Confronting Root Causes: Forced Labour in Global Supply Chains (openDEMOCRACY & SPERI, 2018); https://eprints.whiterose.ac.uk/126167/1/Confronting_Root_Causes_Forced_Labour_In_Global_Supply_Chains.pdf