APA (7th ed.) Citation

Riordan, E. J., & O'Brien, G. (1920). Modern Irish trade and industry (1st published.). Methuen & Co.

Chicago Style (17th ed.) Citation

Riordan, E. J., and George O'Brien. Modern Irish Trade and Industry. 1st published. London: Methuen & Co, 1920.

MLA (9th ed.) Citation

Riordan, E. J., and George O'Brien. Modern Irish Trade and Industry. 1st published. Methuen & Co, 1920.