APA (7th ed.) Citation

O, A., O, F., & U, A. Comorbidity: A Modern View on the Problem; Classification (first notice). Publishing House "Kyrylytsya".

Chicago Style (17th ed.) Citation

O, Abrahamovych, Fayura O, and Abrahamovych U. Comorbidity: A Modern View on the Problem; Classification (first Notice). Publishing House "Kyrylytsya".

MLA (9th ed.) Citation

O, Abrahamovych, et al. Comorbidity: A Modern View on the Problem; Classification (first Notice). Publishing House "Kyrylytsya".