APA (7th ed.) Citation

Williamson, H. (1981). The trade unions (6. ed.). Heinemann Educational Books.

Chicago Style (17th ed.) Citation

Williamson, Hugh. The Trade Unions. 6. ed. London: Heinemann Educational Books, 1981.

MLA (9th ed.) Citation

Williamson, Hugh. The Trade Unions. 6. ed. Heinemann Educational Books, 1981.