Dyfyniad APA

Shipman, J. T., Wilson, J. D., & Todd, A. W. (2009). An introduction to physical science (12th edition.). Houghton Mifflin.

Dyfyniad Arddull Chicago

Shipman, James T., Jerry D. Wilson, and Aaron W. Todd. An Introduction to Physical Science. 12th edition. Boston: Houghton Mifflin, 2009.

Dyfyniad MLA

Shipman, James T., et al. An Introduction to Physical Science. 12th edition. Houghton Mifflin, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.