Shipman, J. T., Wilson, J. D., & Todd, A. W. (2009). An introduction to physical science (12th edition.). Houghton Mifflin.
Chicago-viite (17. p.)Shipman, James T., Jerry D. Wilson, ja Aaron W. Todd. An Introduction to Physical Science. 12th edition. Boston: Houghton Mifflin, 2009.
MLA-viite (9. p.)Shipman, James T., et al. An Introduction to Physical Science. 12th edition. Houghton Mifflin, 2009.
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