توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

(1995). Valuing the environment: Economic approaches to environmental evaluation : proceedings of a workshop held at Ludgrove Hall, Middlesex Polytechnic, on 13 and 14 June 1990. J. WIley & Sons.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Valuing the Environment: Economic Approaches to Environmental Evaluation : Proceedings of a Workshop Held at Ludgrove Hall, Middlesex Polytechnic, on 13 and 14 June 1990. Chichester: J. WIley & Sons, 1995.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Valuing the Environment: Economic Approaches to Environmental Evaluation : Proceedings of a Workshop Held at Ludgrove Hall, Middlesex Polytechnic, on 13 and 14 June 1990. J. WIley & Sons, 1995.