APA (7th ed.) Citation

Grenfell, W. (1928). The Challenge of Labrador. Grenfell Association of Great Britain and Ireland.

Chicago Style (17th ed.) Citation

Grenfell, Wilfred. The Challenge of Labrador. London: Grenfell Association of Great Britain and Ireland, 1928.

MLA (9th ed.) Citation

Grenfell, Wilfred. The Challenge of Labrador. Grenfell Association of Great Britain and Ireland, 1928.

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