Cita APA

Butz, S. D., & Stephen D. Butz. (2008). Science of earth systems: Spanish Vocabulary and Summaries Student Workbook. Clifton Park, NY: Thomson Delmar Learning.

Chicago Style Citation

Butz, Stephen D., i Stephen D. Butz. Science of Earth Systems: Spanish Vocabulary and Summaries Student Workbook. Clifton Park, NY: Thomson Delmar Learning, 2008.

Cita MLA

Butz, Stephen D., i Stephen D. Butz. Science of Earth Systems: Spanish Vocabulary and Summaries Student Workbook. Clifton Park, NY: Thomson Delmar Learning, 2008.