APA (7th ed.) Citation

(1989). Ahnerts Kalender für Sternfreunde 1990. Johann Ambrosius Barth.

Chicago Style (17th ed.) Citation

Ahnerts Kalender Für Sternfreunde 1990. Leipzig: Johann Ambrosius Barth, 1989.

MLA (8th ed.) Citation

Ahnerts Kalender Für Sternfreunde 1990. Johann Ambrosius Barth, 1989.

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