APA (7th ed.) Citation

Cowan, H. J., & Smith, P. R. (1983). Environmental systems. Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Cowan, Henry J., and Peter R. Smith. Environmental Systems. New York: Van Nostrand Reinhold, 1983.

MLA (9th ed.) Citation

Cowan, Henry J., and Peter R. Smith. Environmental Systems. Van Nostrand Reinhold, 1983.