APA aipamena

Barker, D. J. (1991). An economic analysis of farming coffee and trees at Turrialba, Costa Rica: Comparing small farms with poro (Erythrina poeppigiana) only to those with both laurel (Cordia alliodora) and poro.

Chicago Style aipamena

Barker, David J. An Economic Analysis of Farming Coffee and Trees At Turrialba, Costa Rica: Comparing Small Farms With Poro (Erythrina Poeppigiana) Only to Those With Both Laurel (Cordia Alliodora) and Poro. 1991.

MLA aipamena

Barker, David J. An Economic Analysis of Farming Coffee and Trees At Turrialba, Costa Rica: Comparing Small Farms With Poro (Erythrina Poeppigiana) Only to Those With Both Laurel (Cordia Alliodora) and Poro. 1991.