The Scribner Encyclopedia of American Lives. Charles Scribner's Sons, 1998. ISBN 0-684-80620-7. «Mankiewicz was the youngest of three children born to the German immigrants Franz Mankiewicz, a secondary schoolteacher, and Johanna Blumenau, a homemaker.»
«Erna Mankiewicz Stenbuck, 78, Retired New York Schoolteacher». The New York Times, 19-08-1979 [Consulta: 2 juliol 2008]. «Erna Mankiewicz Stenbuck, a retired, teacher in the New York City schools, died Aug. 1 in Villach, Austria, where she had lived for several years. She was 78 years old. ... She was married in ... to Dr. Joseph Stenbuck, a New York City surgeon who died in 1951. They had no children. She is survived by a brother, Joseph L. ...»
Flint, Peter «Joseph L. Mankiewicz, Literate Skeptic of the Cinema, Dies at 83». The New York Times, 06-02-1993 [Consulta: 1r novembre 2007]. «Joseph L. Mankiewicz, a writer, director and producer who was one of Hollywood's most literate and intelligent film makers, died yesterday at Northern Westchester Hospital in Mount Kisco, N.Y. He was 83 and lived in Bedford, N.Y.»
