@misc{Opie_Frederick_Douglass_Black_2009,
 author={Opie, Frederick Douglass},
 address={Gainesville},
 howpublished={online},
 year={2009},
 publisher={University Press of Florida},
 title={Black labour migration in Caribbean Guatemala, 1882-1923},
 keywords={historia pracy, Ameryka Środkowa, migracja},
}