APA (7th ed.) Citation

Hetman, V. I. (2015). Functional differences of prepositions usage in British and American English (based on the BBC and CNN Internet news).

Chicago Style (17th ed.) Citation

Hetman, V. I. Functional Differences of Prepositions Usage in British and American English (based on the BBC and CNN Internet News). 2015.

MLA (8th ed.) Citation

Hetman, V. I. Functional Differences of Prepositions Usage in British and American English (based on the BBC and CNN Internet News). 2015.

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