Zoltai, S. C., & Pettapiece, W. W. (1973). Studies of vegetation, land form and permafrost in the Mackenzie Valley: Terrain vegetation and permafrost relationships in the northern part of the Mackenzie Valley and northern Yukon. Information Canada.
Cita Chicago Style (17a ed.)Zoltai, S. C., y W. W. Pettapiece. Studies of Vegetation, Land Form and Permafrost in the Mackenzie Valley: Terrain Vegetation and Permafrost Relationships in the Northern Part of the Mackenzie Valley and Northern Yukon. [Ottawa]: Information Canada, 1973.
Cita MLA (8a ed.)Zoltai, S. C., y W. W. Pettapiece. Studies of Vegetation, Land Form and Permafrost in the Mackenzie Valley: Terrain Vegetation and Permafrost Relationships in the Northern Part of the Mackenzie Valley and Northern Yukon. Information Canada, 1973.