Cita APA (7th ed.)

Ackerman, E. A. (1958). Geography as a fundamental research discipline. University of Chicago.

Cita Chicago (17th ed.)

Ackerman, Edward A. Geography as a Fundamental Research Discipline. Chicago: University of Chicago, 1958.

Cita MLA (9th ed.)

Ackerman, Edward A. Geography as a Fundamental Research Discipline. University of Chicago, 1958.