Cita APA (7a ed.)

COWAN, H. J. (1983). Environmental System. Van Nostrand Reinhold.

Cita Chicago Style (17a ed.)

COWAN, Henry J. Environmental System. Van Nostrand Reinhold, 1983.

Cita MLA (8a ed.)

COWAN, Henry J. Environmental System. Van Nostrand Reinhold, 1983.