APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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