APA

BAYER A., . (1987). Engel. Freiburg: Herder.

Chicago

BAYER Annegrret, . 1987. Engel. Freiburg: Herder.

Harvard

BAYER A., . (1987). Engel. Freiburg: Herder.

MLA

BAYER Annegrret, . Engel. Freiburg: Herder. 1987.