Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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