Cita APA (7th ed.)

(2017). Earth: An introduction to physical geology. Pearson Education.

Cita Chicago (17th ed.)

Earth: An Introduction to Physical Geology. Pearson Education, 2017.

Cita MLA (9th ed.)

Earth: An Introduction to Physical Geology. Pearson Education, 2017.

Atenció: Aquestes cites poden no estar 100% correctes.