APA (7th ed.) Citation

Horn, Y., Walach, N., Zeidman, J., & Sharf, S. CEA levels in active and non active malignant tumors.

Chicago Style (17th ed.) Citation

Horn, Y., N. Walach, J.L Zeidman, and S. Sharf. CEA Levels in Active and Non Active Malignant Tumors.

MLA (9th ed.) Citation

Horn, Y., et al. CEA Levels in Active and Non Active Malignant Tumors.