Dyfyniad APA

Lena, H. F., Helmreich, W. B., & McCord, W. J. (1992). Contemporary issues in Society. McGraw-Hill,c.

Dyfyniad Arddull Chicago

Lena, Hugh F., William B. Helmreich, and William J. McCord. Contemporary Issues in Society. New York: McGraw-Hill,c, 1992.

Dyfyniad MLA

Lena, Hugh F., et al. Contemporary Issues in Society. McGraw-Hill,c, 1992.

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