APA (7th ed.) Citation

Opalko, A. I., & Opalko, O. A. (2015). The outlook for the improvement of breeding and genetics problems of apple tree (Malus Mill.).

Chicago Style (17th ed.) Citation

Opalko, A. I., and O. A. Opalko. The Outlook for the Improvement of Breeding and Genetics Problems of Apple Tree (Malus Mill.). 2015.

MLA (8th ed.) Citation

Opalko, A. I., and O. A. Opalko. The Outlook for the Improvement of Breeding and Genetics Problems of Apple Tree (Malus Mill.). 2015.

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