(2017). Earth: An introduction to physical geology. Pearson Education.
Lua i Stíl Chicago (17ú heag.)Earth: An Introduction to Physical Geology. Pearson Education, 2017.
Lua MLA (9ú heag.)Earth: An Introduction to Physical Geology. Pearson Education, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.