APA-viite

Löfgren, A., Hagberg, J., Arrelöv, B., Ponzer, S., & Alexanderson, K. (2007). Frequency and nature of problems associated with sickness certification tasks: A cross-sectional questionnaire study of 5455 physicians. Informa Healthcare.

Chicago-tyylinen lähdeviittaus

Löfgren, Anna, Jan Hagberg, Britt Arrelöv, Sari Ponzer, ja Kristina Alexanderson. Frequency and Nature of Problems Associated With Sickness Certification Tasks: A Cross-sectional Questionnaire Study of 5455 Physicians. Informa Healthcare, 2007.

MLA-viite

Löfgren, Anna, et al. Frequency and Nature of Problems Associated With Sickness Certification Tasks: A Cross-sectional Questionnaire Study of 5455 Physicians. Informa Healthcare, 2007.

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