Dyfyniad APA

Ladd, E. C., & Bowman, K. H. (1999). Public opinion about abortion (2nd ed.). AEI Press.

Dyfyniad Arddull Chicago

Ladd, Everett Carll, and Karlyn H. Bowman. Public Opinion About Abortion. 2nd ed. Washington, D.C.: AEI Press, 1999.

Dyfyniad MLA

Ladd, Everett Carll, and Karlyn H. Bowman. Public Opinion About Abortion. 2nd ed. AEI Press, 1999.

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