Heuss, Theodor. "Frontmatter". 1933-1945 Theodor Heuss, In der Defensive: Briefe 1933-1945, edited by Elke Seefried, Berlin, New York: K. G. Saur, 2009, pp. 1-4. https://doi.org/10.1515/9783598441295.fm
Heuss, T. (2009). Frontmatter. In E. Seefried (Ed.), 1933-1945 Theodor Heuss, In der Defensive: Briefe 1933-1945 (pp. 1-4). Berlin, New York: K. G. Saur. https://doi.org/10.1515/9783598441295.fm
Heuss, T. 2009. Frontmatter. In: Seefried, E. ed. 1933-1945 Theodor Heuss, In der Defensive: Briefe 1933-1945. Berlin, New York: K. G. Saur, pp. 1-4. https://doi.org/10.1515/9783598441295.fm
Heuss, Theodor. "Frontmatter" In 1933-1945 Theodor Heuss, In der Defensive: Briefe 1933-1945 edited by Elke Seefried, 1-4. Berlin, New York: K. G. Saur, 2009. https://doi.org/10.1515/9783598441295.fm
Heuss T. Frontmatter. In: Seefried E (ed.) 1933-1945 Theodor Heuss, In der Defensive: Briefe 1933-1945. Berlin, New York: K. G. Saur; 2009. p.1-4. https://doi.org/10.1515/9783598441295.fm