Hall, J. A. (1957). Timber Resources. United States Department of Agriculture.
Chicago Style aipamenaHall, J. A. Timber Resources. Madison: United States Department of Agriculture, 1957.
MLA aipamenaHall, J. A. Timber Resources. United States Department of Agriculture, 1957.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.