APA

(1973). IUFRO Biomass studies. Canadá: University of Maine at Orono.

Chicago

1973. IUFRO Biomass studies. Canadá: University of Maine at Orono.

Harvard

(1973). IUFRO Biomass studies. Canadá: University of Maine at Orono.

MLA

IUFRO Biomass studies. Canadá: University of Maine at Orono. 1973.