APA (7th ed.) Citation

Felix & Theo. (1993). Adel und edle Steine. Langenscheidt.

Chicago Style (17th ed.) Citation

Felix and Theo. Adel Und Edle Steine. Berlin [etc.]: Langenscheidt, 1993.

MLA (9th ed.) Citation

Felix and Theo. Adel Und Edle Steine. Langenscheidt, 1993.

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