Citazione Stile APA (7a Edizione)

Spencer, E. W. (1988). Introduction to the structure of the earth. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Spencer, Edgar W. Introduction to the Structure of the Earth. New York: McGraw-Hill, 1988.

Citatione MLA (9a ed.)

Spencer, Edgar W. Introduction to the Structure of the Earth. McGraw-Hill, 1988.