APA

Barrett J. W., . (1980). Regional silviculture of the United States. New York: Wiley.

Chicago

Barrett John W, . 1980. Regional silviculture of the United States. New York: Wiley.

Harvard

Barrett J. W., . (1980). Regional silviculture of the United States. New York: Wiley.

MLA

Barrett John W, . Regional silviculture of the United States. New York: Wiley. 1980.