एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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