Dyfyniad APA

Snow, D. M. (2011). National security for a new era (4th ed.). Longman.

Dyfyniad Arddull Chicago

Snow, Donald M. National Security for a New Era. 4th ed. Boston, MA: Longman, 2011.

Dyfyniad MLA

Snow, Donald M. National Security for a New Era. 4th ed. Longman, 2011.

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