American Psychological Association 7th edition

Berkel, C. (ca. 2018). Der Apfelbaum : Roman [Book]. Ullstein.

Chicago Manual of Style 17th edition (author-date)

Berkel, Christian. 2018. Der Apfelbaum : Roman. Book. Berlin: Ullstein.

Springer - Basic (author-date)

Berkel C (2018) Der Apfelbaum : Roman. Ullstein, Berlin

Springer - Lecture Notes in Computer Science

1.Berkel, C.: Der Apfelbaum : Roman. Ullstein, Berlin (2018).

DIN 1505-2 (author-date, Deutsch) - standard superseded by ISO-690

Berkel, Christian ; ; ; : Der Apfelbaum : Roman. book. Berlin : Ullstein, 2018 — ISBN 9783550081965

Warning: These citations may not always be 100% accurate.