APA Style

J., D, B, H., Muller, P, O. (1992). Geography Regions and Concepts / Harm J. De Blij and Peter O. Muller (6). New York: John Wiley & Sons.

MLA Style

J., De, Blij,, Harm., Muller, Peter, O.. "Geography Regions and Concepts / Harm J. De Blij and Peter O. Muller". 6 New York: John Wiley & Sons, 1992. Textbook ห้องสมุดทั่วไป.