Dyfyniad APA
Sverdrup, K. A., Duxbury, A. C., & Duxbury, A. (2003). An introduction to the world's oceans (7th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Sverdrup, Keith A., Alyn C. Duxbury, and Alison Duxbury. An Introduction to the World's Oceans. 7th ed. Boston: McGraw-Hill, 2003.
Dyfyniad MLA
Sverdrup, Keith A., et al. An Introduction to the World's Oceans. 7th ed. McGraw-Hill, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.