APA (7th ed.) Citation

Felix, W., Christian, W., & Karsten, S. Classification of Respiratory Diseases. De Gruyter.

Chicago Style (17th ed.) Citation

Felix, Wichum, Wiede Christian, and Seidl Karsten. Classification of Respiratory Diseases. De Gruyter.

MLA (9th ed.) Citation

Felix, Wichum, et al. Classification of Respiratory Diseases. De Gruyter.