Sinunu, W. (2005). Life could be sweeter: 101 great ideas from around the world for living a more rewarding life. Marlowe and Company.
Chicago-referens (17:e uppl.)Sinunu, William. Life Could Be Sweeter: 101 Great Ideas from Around the World for Living a More Rewarding Life. New York: Marlowe and Company, 2005.
MLA-referens (9:e uppl.)Sinunu, William. Life Could Be Sweeter: 101 Great Ideas from Around the World for Living a More Rewarding Life. Marlowe and Company, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.