Dyfyniad APA

Brown, L. R. (1999). Vital Sings 1999: The trends that are shaping our future. New York: W. W. Norton & company.

Dyfyniad Arddull Chicago

Brown, Lester R. Vital Sings 1999: The Trends That Are Shaping Our Future. New York: W. W. Norton & company, 1999.

Dyfyniad MLA

Brown, Lester R. Vital Sings 1999: The Trends That Are Shaping Our Future. New York: W. W. Norton & company, 1999.

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