APA (7th ed.) Citation

Clark, S. P. (1971). Structure of the earth. Prentice-Hall.

Chicago Style (17th ed.) Citation

Clark, Sydney P. Structure of the Earth. Englewood Cliffs, N.J.: Prentice-Hall, 1971.

MLA (9th ed.) Citation

Clark, Sydney P. Structure of the Earth. Prentice-Hall, 1971.