
BBC interview (25 July 2008) http://news.bbc.co.uk/newsbeat/hi/entertainment/newsid_7522000/7522129.stm
Walker, Suzy (interviewer). "The Big Happiness Interview: Susan Cain on how embracing sadness can make us happier", Metro, June 5, 2022.
Bittersweet
BBC interview (25 July 2008) http://news.bbc.co.uk/newsbeat/hi/entertainment/newsid_7522000/7522129.stm
Source: The Courage to Create (1975), Ch. 1 : The Courage to Create, p. 12
musings of Princess Meredith; p. 41
Merry Gentry series, A Stroke of Midnight (2005)