APA (7th ed.) Citation

United States. Forest Service. Eastern Region. Geometronics Unit. (1981). Ottawa National Forest (Scale 1:31,680 ; Polyconic proj. (W 9030'--W 8835'/N 4646'--N 4600').). The Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Eastern Region. Geometronics Unit. Ottawa National Forest. Scale 1:31,680 ; Polyconic proj. (W 9030'--W 8835'/N 4646'--N 4600'). Milwaukee, Wis.: The Service, 1981.

MLA (9th ed.) Citation

United States. Forest Service. Eastern Region. Geometronics Unit. Ottawa National Forest. Scale 1:31,680 ; Polyconic proj. (W 9030'--W 8835'/N 4646'--N 4600'). The Service, 1981.