Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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