Cita APA (7th ed.)

Halal, W. E., & Taylor, K. B. (1999). Twenty-first century economics: Perspectives of socioeconomics for a changing world. St. Martin's Press.

Cita Chicago (17th ed.)

Halal, William E., i Kenneth B. Taylor. Twenty-first Century Economics: Perspectives of Socioeconomics for a Changing World. New York: St. Martin's Press, 1999.

Cita MLA (9th ed.)

Halal, William E., i Kenneth B. Taylor. Twenty-first Century Economics: Perspectives of Socioeconomics for a Changing World. St. Martin's Press, 1999.