Cita APA (7a ed.)

United States. Forest Service. (1989). Northern Region: Summer of '88. Forest Service, US Dept. of Agriculture.

Cita Chicago Style (17a ed.)

United States. Forest Service. Northern Region: Summer of '88. [Missoula, Mont.?]: Forest Service, US Dept. of Agriculture, 1989.

Cita MLA (8a ed.)

United States. Forest Service. Northern Region: Summer of '88. Forest Service, US Dept. of Agriculture, 1989.

Precaución: Estas citas no son 100% exactas.