Catatan Fikirkan kanak-kanak

  1. 1 2 3 Meany 2002, p. 65.
  2. 1 2 3 Marshall 2005
  3. 1 2 Borschke 2011, p. 17.
  4. ↑ National Child Labor Committee 1914, pp. 39, 73.
  5. ↑ Boyce 2003
  6. ↑ Perry 2010, p. 498.
  7. 1 2 Beattie 2009, pp. 165–167.
  8. 1 2 Keenan (October 1, 2014), p. GT4.
  9. ↑ Coleman 2011, p. 99.
  10. ↑ Laity 2013, pp. 118–119, 128.
  11. ↑ Cohen 1996
  12. ↑ Cohen 2005
  13. 1 2 3 Ten Brink 2012, p. 789.
  14. ↑ Shotwell 2012, p. 141.
  15. 1 2 Keenan (April 26, 2014), p. IN2.
  16. ↑ Patrick 2000, p. B5.
  17. ↑ Kitrosser 2011, p. 2395.
  18. ↑ Hunt 2014, p. 27.
  19. ↑ Penny 2011
  20. ↑ Bruenig 2014