APA

Aldo Leopold, Charles W. Schwartz (ill.), . (1989). A Sand County almanac and Sketches here and there. : Oxford University Press.

Chicago

Aldo Leopold, Charles W. Schwartz (ill.), . 1989. A Sand County almanac and Sketches here and there. : Oxford University Press.

Harvard

Aldo Leopold, Charles W. Schwartz (ill.), . (1989). A Sand County almanac and Sketches here and there. : Oxford University Press.

MLA

Aldo Leopold, Charles W. Schwartz (ill.), . A Sand County almanac and Sketches here and there. : Oxford University Press. 1989.