Bloom, A. L. (1969). Surface of earth. Prentice-Hall of India.
Chicago Edition CitationBloom, Arthur L. Surface of Earth. New Jerse: Prentice-Hall of India, 1969.
Cita MLABloom, Arthur L. Surface of Earth. Prentice-Hall of India, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.