SpringerLink (Online service) & Rich, W. C. (2019). Looking Back on President Barack Obama's Legacy: Hope and Change (1st ed. 2019.). Springer International Publishing : Imprint: Palgrave Macmillan. https://doi.org/10.1007/978-3-030-01545-9
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service) και Wilbur C. Rich. Looking Back on President Barack Obama's Legacy: Hope and Change. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Palgrave Macmillan, 2019. https://doi.org/10.1007/978-3-030-01545-9.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service) και Wilbur C. Rich. Looking Back on President Barack Obama's Legacy: Hope and Change. 1st ed. 2019. Springer International Publishing : Imprint: Palgrave Macmillan, 2019. https://doi.org/10.1007/978-3-030-01545-9.
