APA
Sulkers E., Fleer J., Brinksma A., Roodbol P. F., Kamps W. A., Tissing W. J. E. & Sanderman R. (20140225). Dispositional optimism in adolescents with cancer: differential associations of optimism and pessimism with positive and negative aspects of well-being. : British journal of health psychology.
Chicago
Sulkers Esther, Fleer Joke, Brinksma Aeltsje, Roodbol Petrie F, Kamps Willem A, Tissing Wim J E and Sanderman Robbert. 20140225. Dispositional optimism in adolescents with cancer: differential associations of optimism and pessimism with positive and negative aspects of well-being. : British journal of health psychology.
Harvard
Sulkers E., Fleer J., Brinksma A., Roodbol P. F., Kamps W. A., Tissing W. J. E. and Sanderman R. (20140225). Dispositional optimism in adolescents with cancer: differential associations of optimism and pessimism with positive and negative aspects of well-being. : British journal of health psychology.
MLA
Sulkers Esther, Fleer Joke, Brinksma Aeltsje, Roodbol Petrie F, Kamps Willem A, Tissing Wim J E and Sanderman Robbert. Dispositional optimism in adolescents with cancer: differential associations of optimism and pessimism with positive and negative aspects of well-being. : British journal of health psychology. 20140225.