Gaya APA

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

Gaya MLA

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