(1981). Use and misuse of earth's surface. William Kaufmann.
Cita Chicago (17th ed.)Use and Misuse of Earth's Surface. Los Altos, Calif.: William Kaufmann, 1981.
Cita MLA (9th ed.)Use and Misuse of Earth's Surface. William Kaufmann, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.