Wolff, H., & Kolling, H. (1997). Biographisches Lexikon zur Pflegegeschichte: = Who was who in nursing history. Ullstein Mosby.
Chicago Style (17th ed.) CitationWolff, Horst-Peter, and Hubert Kolling. Biographisches Lexikon Zur Pflegegeschichte: = Who Was Who in Nursing History. Berlin [u.a.]: Ullstein Mosby, 1997.
MLA (9th ed.) CitationWolff, Horst-Peter, and Hubert Kolling. Biographisches Lexikon Zur Pflegegeschichte: = Who Was Who in Nursing History. Ullstein Mosby, 1997.
Warning: These citations may not always be 100% accurate.