Cita APA (7th ed.)

EICHER, D. L. (1980). History of the earth. Prentice-Hall.

Cita Chicago (17th ed.)

EICHER, Don L. History of the Earth. Englewood Cliffs, N.J.: Prentice-Hall, 1980.

Cita MLA (9th ed.)

EICHER, Don L. History of the Earth. Prentice-Hall, 1980.