Lehn, H. .
Chicago Style (17th ed.) CitationLehn, Helmut. .
MLA (9th ed.) CitationLehn, Helmut. .
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation
Lehn, H. .
Chicago Style (17th ed.) CitationLehn, Helmut. .
MLA (9th ed.) CitationLehn, Helmut. .