Steinfeld 2009, стр. 3: "All labor contracts were/are designed legally to bind a worker in one way or another to fulfill the labor obligations the worker has undertaken. That is one of the principal purposes of labor contracts." Steinfeld, Robert (2009). Coercion/Consent in Labor(PDF). COMPAS Working Paper No. 66. Oxford: University of Oxford. Архивирано из оригинала(PDF) 1. 3. 2014. г. Приступљено 3. 3. 2013.
Steinfeld 2009, стр. 3: "All labor contracts were/are designed legally to bind a worker in one way or another to fulfill the labor obligations the worker has undertaken. That is one of the principal purposes of labor contracts." Steinfeld, Robert (2009). Coercion/Consent in Labor(PDF). COMPAS Working Paper No. 66. Oxford: University of Oxford. Архивирано из оригинала(PDF) 1. 3. 2014. г. Приступљено 3. 3. 2013.