APA (7th ed.) Citation

Barker, A. V. (1980). Efficient use of nitrogen on crop land in the northeast. Conn. Agricultural Experiment Station.

Chicago Style (17th ed.) Citation

Barker, Allen V. Efficient Use of Nitrogen on Crop Land in the Northeast. New Haven, Conn: Conn. Agricultural Experiment Station, 1980.

MLA (9th ed.) Citation

Barker, Allen V. Efficient Use of Nitrogen on Crop Land in the Northeast. Conn. Agricultural Experiment Station, 1980.