APA (7th ed.) Citation

Sammlung J. Bossard, Luzern. Helbing. https://doi.org/10.11588/diglit.15609

Chicago Style (17th ed.) Citation

Sammlung J. Bossard, Luzern. München: Helbing. https://doi.org/10.11588/diglit.15609.

MLA (9th ed.) Citation

Sammlung J. Bossard, Luzern. Helbing. https://doi.org/10.11588/diglit.15609.

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