APA (7th ed.) Citation

Krastev, G., Stančev, C., & Ivanov, V. An approach to control of spark ignition engine at idling.

Chicago Style (17th ed.) Citation

Krastev, Georgi, Christo Stančev, and Valentin Ivanov. An Approach to Control of Spark Ignition Engine at Idling.

MLA (9th ed.) Citation

Krastev, Georgi, et al. An Approach to Control of Spark Ignition Engine at Idling.

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