APA (7th ed.) Citation

Spiekman, W. G. Letter, including list of affiliated British unions.

Chicago Style (17th ed.) Citation

Spiekman, W. G. Letter, Including List of Affiliated British Unions.

MLA (8th ed.) Citation

Spiekman, W. G. Letter, Including List of Affiliated British Unions.

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