APA (7e ed.) Bronvermelding

Shorter,Laurence. The optimist: One man's search for the brighter side of life. Canongate.

Chicago (17e ed.) Bronvermelding

Shorter,Laurence. The Optimist: One Man's Search for the Brighter Side of Life. Canongate.

MLA (8e ed.) Bronvermelding

Shorter,Laurence. The Optimist: One Man's Search for the Brighter Side of Life. Canongate.

Let op: Deze citaties zijn niet altijd 100% accuraat.