APA (7th ed.) Citation

Wigham, E. L. (1969). Trade unions (2nd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Wigham, Eric L. Trade Unions. 2nd ed. London: Oxford University Press, 1969.

MLA (8th ed.) Citation

Wigham, Eric L. Trade Unions. 2nd ed. Oxford University Press, 1969.