(2017). Earth: An introduction to physical geology. Pearson Education.
Čikaški stil citiranja (17. izdanje)Earth: An Introduction to Physical Geology. Pearson Education, 2017.
MLA način citiranja (9. izdanje)Earth: An Introduction to Physical Geology. Pearson Education, 2017.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.