APA (7th ed.) Citation

Schmidt, G., & Ritter, J. (1954). Wunderwelt der Steine (16.-20. Tausend.). Ernst Wunderlich.

Chicago Style (17th ed.) Citation

Schmidt, Gerhard, and Jürgen Ritter. Wunderwelt Der Steine. 16.-20. Tausend. Leipzig: Ernst Wunderlich, 1954.

MLA (8th ed.) Citation

Schmidt, Gerhard, and Jürgen Ritter. Wunderwelt Der Steine. 16.-20. Tausend. Ernst Wunderlich, 1954.

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