APA (7th ed.) Citation

(1906). From left to right: Karl jr., ?, Luise, Benedikt.

Chicago Style (17th ed.) Citation

From Left to Right: Karl Jr., ?, Luise, Benedikt. 1906.

MLA (8th ed.) Citation

From Left to Right: Karl Jr., ?, Luise, Benedikt. 1906.

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