Παραπομπή APA

Bloom, A. L. (1969). Surface of earth. Prentice-Hall of India.

Παραπομπή Chicago Style

Bloom, Arthur L. Surface of Earth. New Jerse: Prentice-Hall of India, 1969.

Παραπομπή MLA

Bloom, Arthur L. Surface of Earth. Prentice-Hall of India, 1969.