Butler, W. F. (1874). The wild North Land: Being the story of a winter journey, with dogs, across northern North America (3a. ed.). Sampson Low, Marston, Low, & Searle.
Cita Chicago (17th ed.)Butler, W. F. The Wild North Land: Being the Story of a Winter Journey, with Dogs, Across Northern North America. 3a. ed. Londres: Sampson Low, Marston, Low, & Searle, 1874.
Cita MLA (9th ed.)Butler, W. F. The Wild North Land: Being the Story of a Winter Journey, with Dogs, Across Northern North America. 3a. ed. Sampson Low, Marston, Low, & Searle, 1874.
Atenció: Aquestes cites poden no estar 100% correctes.