H. Jackson Brown Jr. (2007). “Complete Life's Little Instruction Book: 1,560 Suggestions, Observations, and Reminders on How to Live a Happy and Rewarding Life”, p.28, Thomas Nelson Inc
"'I wear nice underwear to keep my husband': Miranda Kerr has the most progressive attitude towards relationships EVER" by Corinne Redfern, www.mirror.co.uk. December 05, 2012.