Cita APA (7a ed.)

Spencer, E. W. (1969). Introduction to the structure of the earth. McGraw-Hill.

Cita Chicago Style (17a ed.)

Spencer, Edgar Winston. Introduction to the Structure of the Earth. New York: McGraw-Hill, 1969.

Cita MLA (8a ed.)

Spencer, Edgar Winston. Introduction to the Structure of the Earth. McGraw-Hill, 1969.