APA (7th ed.) Citation

Christensen, K. E. (1981). Geography as a human science: A philosophical critique. Pennsylvania State University.

Chicago Style (17th ed.) Citation

Christensen, Kathleen Elizabeth. Geography as a Human Science: A Philosophical Critique. Phildelphia: Pennsylvania State University, 1981.

MLA (8th ed.) Citation

Christensen, Kathleen Elizabeth. Geography as a Human Science: A Philosophical Critique. Pennsylvania State University, 1981.