APA (7th ed.) Citation

Ahrens, W. (1999). Retrospective assessment of occupational exposure in case control studies: Development, evaluation and comparison of different methods. Ecomed.

Chicago Style (17th ed.) Citation

Ahrens, Wolfgang. Retrospective Assessment of Occupational Exposure in Case Control Studies: Development, Evaluation and Comparison of Different Methods. Landsberg: Ecomed, 1999.

MLA (9th ed.) Citation

Ahrens, Wolfgang. Retrospective Assessment of Occupational Exposure in Case Control Studies: Development, Evaluation and Comparison of Different Methods. Ecomed, 1999.