Dyfyniad APA

Knight, J., & Gunatilaka, R. (2009). Is Happiness Infectious? Department of Economics (University of Oxford).

Dyfyniad Arddull Chicago

Knight, J., and R. Gunatilaka. Is Happiness Infectious? Department of Economics (University of Oxford), 2009.

Dyfyniad MLA

Knight, J., and R. Gunatilaka. Is Happiness Infectious? Department of Economics (University of Oxford), 2009.

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