Dr. Ch. Evy Tri Widyahening and Drs. AR. Koesdyantho 2021. The Struggle of Frederick Douglass to Get his Freedom as Seen in the Narrative of the Life of Frederick Douglass: An American Slave (A Psychological Approach). Researchers World - International Refereed Social Sciences Journal. 9, 2 (Aug. 2021), 152–158.