APA-referens

Hudson,Travis. (2011). Living with earth: An introduction to environmental geology. Pearson education.

Chicago-stil citat

Hudson,Travis. Living with Earth: An Introduction to Environmental Geology. Boston: Pearson education, 2011.

MLA-referens

Hudson,Travis. Living with Earth: An Introduction to Environmental Geology. Pearson education, 2011.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.