APA (7th ed.) Citation

Russell, P. (1995). An introduction to the celtic languages. Longman.

Chicago Style (17th ed.) Citation

Russell, Paul. An Introduction to the Celtic Languages. London: Longman, 1995.

MLA (8th ed.) Citation

Russell, Paul. An Introduction to the Celtic Languages. Longman, 1995.

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