APA

Entrikin J. N., Hartshorne R. & Association of American Geographers. (1989). Reflections on Richard Hartshorne's "The nature of geography". Washington, D.C: Ass. of American Geographers.

Chicago

Entrikin J N, Hartshorne Richard and Association of American Geographers. 1989. Reflections on Richard Hartshorne's "The nature of geography". Washington, D.C: Ass. of American Geographers.

Harvard

Entrikin J. N., Hartshorne R. and Association of American Geographers. (1989). Reflections on Richard Hartshorne's "The nature of geography". Washington, D.C: Ass. of American Geographers.

MLA

Entrikin J N, Hartshorne Richard and Association of American Geographers. Reflections on Richard Hartshorne's "The nature of geography". Washington, D.C: Ass. of American Geographers. 1989.