APA

Astrand N. E., Isacsson S. O., . (19880901). Back pain, back abnormalities, and competing medical, psychological, and social factors as predictors of sick leave, early retirement, unemployment, labour turnover and mortality: a 22 year follow up of male employees in a Swedish pulp and paper company. : British journal of industrial medicine.

Chicago

Astrand N E, Isacsson S O, . 19880901. Back pain, back abnormalities, and competing medical, psychological, and social factors as predictors of sick leave, early retirement, unemployment, labour turnover and mortality: a 22 year follow up of male employees in a Swedish pulp and paper company. : British journal of industrial medicine.

Harvard

Astrand N. E., Isacsson S. O., . (19880901). Back pain, back abnormalities, and competing medical, psychological, and social factors as predictors of sick leave, early retirement, unemployment, labour turnover and mortality: a 22 year follow up of male employees in a Swedish pulp and paper company. : British journal of industrial medicine.

MLA

Astrand N E, Isacsson S O, . Back pain, back abnormalities, and competing medical, psychological, and social factors as predictors of sick leave, early retirement, unemployment, labour turnover and mortality: a 22 year follow up of male employees in a Swedish pulp and paper company. : British journal of industrial medicine. 19880901.