APA
White I., Mottershead D. & Harrison S. J. (1992). Environmental systems: an introductory text. London [etc.]: Chapman & Hall.
Chicago
White Iain, Mottershead Derek and Harrison Steven John. 1992. Environmental systems: an introductory text. London [etc.]: Chapman & Hall.
Harvard
White I., Mottershead D. and Harrison S. J. (1992). Environmental systems: an introductory text. London [etc.]: Chapman & Hall.
MLA
White Iain, Mottershead Derek and Harrison Steven John. Environmental systems: an introductory text. London [etc.]: Chapman & Hall. 1992.