APA (7th ed.) Citation

Tkanko, O. V., & Petrenko, A. I. (2013). Using ontology for querying in relational database.

Chicago Style (17th ed.) Citation

Tkanko, O. V., and A. I. Petrenko. Using Ontology for Querying in Relational Database. 2013.

MLA (8th ed.) Citation

Tkanko, O. V., and A. I. Petrenko. Using Ontology for Querying in Relational Database. 2013.

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