Cita APA (7a ed.)
Wray, R. D. (2009). Christmas trees for pleasure and profit (4th ed.). Rutgers University Press.
Cita Chicago Style (17a ed.)
Wray, Robert D. Christmas Trees for Pleasure and Profit. 4th ed. New Brunswick, N.J.: Rutgers University Press, 2009.
Cita MLA (9a ed.)
Wray, Robert D. Christmas Trees for Pleasure and Profit. 4th ed. Rutgers University Press, 2009.
Precaución: Estas citas no son 100% exactas.