APA

Pettersson K., Patkai P., . (1975). Interindividual differences in diurnal rhytms among day workers with flexible working hours. Stockholm: Stockholms Universitet. Psykologi. Rapport nr 447.

Chicago

Pettersson K, Patkai P, . 1975. Interindividual differences in diurnal rhytms among day workers with flexible working hours. Stockholm: Stockholms Universitet. Psykologi. Rapport nr 447.

Harvard

Pettersson K., Patkai P., . (1975). Interindividual differences in diurnal rhytms among day workers with flexible working hours. Stockholm: Stockholms Universitet. Psykologi. Rapport nr 447.

MLA

Pettersson K, Patkai P, . Interindividual differences in diurnal rhytms among day workers with flexible working hours. Stockholm: Stockholms Universitet. Psykologi. Rapport nr 447. 1975.