APA (7th ed.) Citation

Waldron, H. A., & Edling, C. (1997). Occupational health practice (4rd ed.). Butterworths.

Chicago Style (17th ed.) Citation

Waldron, H. A., and Christofer Edling. Occupational Health Practice. 4rd ed. London: Butterworths, 1997.

MLA (8th ed.) Citation

Waldron, H. A., and Christofer Edling. Occupational Health Practice. 4rd ed. Butterworths, 1997.