Engelman. The Selected Papers of Margaret Sanger, Volume 4. University of Illinois Press.
Citazione stile Chigago Style (17a edizione)Engelman. The Selected Papers of Margaret Sanger, Volume 4. University of Illinois Press.
Citatione MLA (8a ed.)Engelman. The Selected Papers of Margaret Sanger, Volume 4. University of Illinois Press.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.