APA (7th ed.) Citation

Tzingilev, D., Ivanova, T., Todorov, V., & Sirakov, L. M. Alpha-Fetoprotein in the Serum of Patients with Neoplasms of the Gastrointestinal Tract.

Chicago Style (17th ed.) Citation

Tzingilev, D., Tz Ivanova, V. Todorov, and L. M. Sirakov. Alpha-Fetoprotein in the Serum of Patients with Neoplasms of the Gastrointestinal Tract.

MLA (9th ed.) Citation

Tzingilev, D., et al. Alpha-Fetoprotein in the Serum of Patients with Neoplasms of the Gastrointestinal Tract.