APA (7th ed.) Citation

United States. Forest Service. (1984). Allegheny National Forest, Pennsylvania, 1973 (Minor revisions added from 1973 field examination, Limited revision Dec. 1981.). The Office.

Chicago Style (17th ed.) Citation

United States. Forest Service. Allegheny National Forest, Pennsylvania, 1973. Minor revisions added from 1973 field examination, Limited revision Dec. 1981. [Milwaukee, Wis.?]: The Office, 1984.

MLA (9th ed.) Citation

United States. Forest Service. Allegheny National Forest, Pennsylvania, 1973. Minor revisions added from 1973 field examination, Limited revision Dec. 1981. The Office, 1984.