APA (7th ed.) Citation

Horrabin, J. F., & Gregory, J. S. An atlas of the USSR.

Chicago Style (17th ed.) Citation

Horrabin, James F., and James S. Gregory. An Atlas of the USSR.

MLA (8th ed.) Citation

Horrabin, James F., and James S. Gregory. An Atlas of the USSR.

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