Dyfyniad APA

Sverdrup, K. A., Duxbury, A., & Duxbury, A. C. (2003). An introduction to the world's oceans (7th ed.). Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

Sverdrup, Keith A., Alison Duxbury, và Alyn C. Duxbury. An Introduction to the World's Oceans. 7th ed. Boston: McGraw-Hill, 2003.

Dyfyniad MLA

Sverdrup, Keith A., Alison Duxbury, và Alyn C. Duxbury. An Introduction to the World's Oceans. 7th ed. Boston: McGraw-Hill, 2003.

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