How to enjoy your life and your job /
Carnegie, Dale,1888-1955.
Carnegie, Dale.How to win friends and influence people.
Carnegie, Dale.How to stop worrying and start living.
Tadworth World's Work
1973
Selections from 'How to win friends and influence people', originally published, New York: Simon and Schuster, 1936; and from 'How to stop worrying and start living', originally published, New York: Simon and Schuster, 1948
Mental hygiene.