APA (7th ed.) Citation

Groma, V. G., Frolov, J., & Olejnik, A. E. (2013). Morphological characteristics of perforated gastric cancer.

Chicago Style (17th ed.) Citation

Groma, V. G., Ju Frolov, and A. E. Olejnik. Morphological Characteristics of Perforated Gastric Cancer. 2013.

MLA (8th ed.) Citation

Groma, V. G., et al. Morphological Characteristics of Perforated Gastric Cancer. 2013.

Warning: These citations may not always be 100% accurate.