Style de citation APA

Paulo Coelho & Clarke Alan R. (1997). By the river Piedra I sat down and wept. Thorsons.

Style de citation Chicago

Paulo Coelho et Clarke Alan R. By the River Piedra I Sat Down and Wept. London: Thorsons, 1997.

Style de citation MLA

Paulo Coelho et Clarke Alan R. By the River Piedra I Sat Down and Wept. Thorsons, 1997.