Cita APA (7th ed.)
Hanwell, J. D., & Newson, M. D. (1973). Techniques in physical geography. Macmillan.
Cita Chicago (17th ed.)
Hanwell, James D., i Malcolm David Newson. Techniques in Physical Geography. London: Macmillan, 1973.
Cita MLA (9th ed.)
Hanwell, James D., i Malcolm David Newson. Techniques in Physical Geography. Macmillan, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.