APA (7th ed.) Citation

Halfpenny, J. C., & Ozanne, R. D. (1989). Winter: An ecological handbook. Johnson Books.

Chicago Style (17th ed.) Citation

Halfpenny, James C., and Roy Douglas Ozanne. Winter: An Ecological Handbook. Boulder, Colo.: Johnson Books, 1989.

MLA (9th ed.) Citation

Halfpenny, James C., and Roy Douglas Ozanne. Winter: An Ecological Handbook. Johnson Books, 1989.