Gaya APA

Swanson, C, P., , . (1983). Firewood crops shrub and tree species for energy production vol 2 . Washington: Washington: National Academy; 1983.

Gaya MLA

Swanson, Carl, P.., , . "Firewood crops shrub and tree species for energy production vol 2". Washington: Washington: National Academy; 1983, 1983. Text.