Dyfyniad APA

Friedman, H. S. (1990). Personality and disease. John Wiley & Sons.

Dyfyniad Arddull Chicago

Friedman, Howard S. Personality and Disease. New York: John Wiley & Sons, 1990.

Dyfyniad MLA

Friedman, Howard S. Personality and Disease. John Wiley & Sons, 1990.

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