Cita APA (7a ed.)

Ahlgren, C. E., & Ahlgren, I. (2001). Lob Trees In The Wilderness: The Human and Natural History of the Boundary Waters. University of Minnesota Press.

Cita Chicago Style (17a ed.)

Ahlgren, C. E., y Isabel Ahlgren. Lob Trees In The Wilderness: The Human and Natural History of the Boundary Waters. Minneapolis: University of Minnesota Press, 2001.

Cita MLA (8a ed.)

Ahlgren, C. E., y Isabel Ahlgren. Lob Trees In The Wilderness: The Human and Natural History of the Boundary Waters. University of Minnesota Press, 2001.