@InBook{Mankiwproduction,
  chapter   = {18 - The {M}arkets for the {F}actors of {P}roduction},
  pages     = {382--402},
  title     = {Economics},
  publisher = {South Western CENGAGE Learning},
  year      = {2011},
  author    = {N. Gregory Mankiw and Mark P. Taylor},
  edition   = {2.},
  note      = {(21 sider)},
}

 @InBook{Mankiwdiscrimination,
  chapter   = {19 - Earnings and {D}iscrimination},
  pages     = {403--417},
  title     = {Economics},
  publisher = {South Western CENGAGE Learning},
  year      = {2011},
  author    = {N. Gregory Mankiw and Mark P. Taylor},
  edition   = {2.},
  note      = {(21 sider)},
}