APA (7th ed.) Citation

Roberts, P. S., & Zavitkovski, J. (1981). Growth of hybrid poplars, white spruce, and jack pine under various artificial lights. U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station.

Chicago Style (17th ed.) Citation

Roberts, Pamela S., and J. Zavitkovski. Growth of Hybrid Poplars, White Spruce, and Jack Pine Under Various Artificial Lights. St. Paul, Minn.: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1981.

MLA (9th ed.) Citation

Roberts, Pamela S., and J. Zavitkovski. Growth of Hybrid Poplars, White Spruce, and Jack Pine Under Various Artificial Lights. U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1981.