Lounsbury John F. & Aldrich, F. T. (1986). Introduction to geographic field: Methods and techniques (2nd ed,.). Charles E. Merrill.
Cita Chicago (17th ed.)Lounsbury John F. i Frank T. Aldrich. Introduction to Geographic Field: Methods and Techniques. 2nd ed,. London: Charles E. Merrill, 1986.
Cita MLA (9th ed.)Lounsbury John F. i Frank T. Aldrich. Introduction to Geographic Field: Methods and Techniques. 2nd ed,. Charles E. Merrill, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.