Gelbin, C. S. (2020). Learning years on the path to dissidence: Stefan Heym's friendship with Robert Havemann and Wolf Biermann. Rebuilding Jewish life in Germany.
Chicago-viite (17. p.)Gelbin, Cathy S. "Learning Years on the Path to Dissidence: Stefan Heym's Friendship with Robert Havemann and Wolf Biermann." Rebuilding Jewish Life in Germany 2020.
MLA-viite (8. p.)Gelbin, Cathy S. "Learning Years on the Path to Dissidence: Stefan Heym's Friendship with Robert Havemann and Wolf Biermann." Rebuilding Jewish Life in Germany, 2020.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.