APA-čujuhus (7. p.)
Wray, R. D. (2009). Christmas trees for pleasure and profit (4th ed.). Rutgers University Press.
Chicago-čujuhus (17. p.)
Wray, Robert D. Christmas Trees for Pleasure and Profit. 4th ed. New Brunswick, N.J.: Rutgers University Press, 2009.
MLA-čujuhus (9. p.)
Wray, Robert D. Christmas Trees for Pleasure and Profit. 4th ed. Rutgers University Press, 2009.
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