Cissy Houston, Grammy winner and Whitney Houston’s mother, dies at 91 The Washington PostCissy Houston, Grammy-winning singer and mother of Whitney Houston, dead at 91 CNNGospel great Cissy Houston has died at the age of 91 NPRBobby Brown on Death of Former Mother-in-Law Cissy Houston (Exclusive) PEOPLECissy Houston Dies at 91; Gospel Star Guided Daughter Whitney’s Rise The New York Times