APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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