Παραπομπή σε μορφή APA (7η εκδ.)

Hal, J. a. (1972). Forest fuels, prescribed fire, and air quality. Pacific Northwest Forest and Range Experiment Station Forest Service U.S. Department of Agriculture Portland.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hal, J. alfred. Forest Fuels, Prescribed Fire, and Air Quality. Oregon: Pacific Northwest Forest and Range Experiment Station Forest Service U.S. Department of Agriculture Portland, 1972.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hal, J. alfred. Forest Fuels, Prescribed Fire, and Air Quality. Pacific Northwest Forest and Range Experiment Station Forest Service U.S. Department of Agriculture Portland, 1972.