Gaya APA

Ulrich, A, H. (1984). U.S. timber production, trade consumption, and price statistics 1950-83 . Washington: United States Departement of Agriculture.

Gaya MLA

Ulrich, Alice, H.. "U.S. timber production, trade consumption, and price statistics 1950-83". Washington: United States Departement of Agriculture, 1984. Printed Book.