Cita APA (7th ed.)

Heym, S. (1969). Uncertain friend: A biographical novel (1. publ.). Cassell.

Cita Chicago (17th ed.)

Heym, Stefan. Uncertain Friend: A Biographical Novel. 1. publ. London: Cassell, 1969.

Cita MLA (8th ed.)

Heym, Stefan. Uncertain Friend: A Biographical Novel. 1. publ. Cassell, 1969.