APA (7th ed.) Citation

Koval,Alexander. (1987). Space flights serve life on earth. Progress publishers.

Chicago Style (17th ed.) Citation

Koval,Alexander. Space Flights Serve Life on Earth. Moscow: Progress publishers, 1987.

MLA (9th ed.) Citation

Koval,Alexander. Space Flights Serve Life on Earth. Progress publishers, 1987.

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