Παραπομπή σε μορφή APA (7η εκδ.)

Kozlowski, J. M., & Hill, G. (1993). Towards planning for sustainable development: A guide for the ultimate environmental threshold (UET) method. Ashgate.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Kozlowski, Jerzy M., και Greg Hill. Towards Planning for Sustainable Development: A Guide for the Ultimate Environmental Threshold (UET) Method. Aldershot: Ashgate, 1993.

Παραπομπή σε μορφή MLA (9th εκδ.)

Kozlowski, Jerzy M., και Greg Hill. Towards Planning for Sustainable Development: A Guide for the Ultimate Environmental Threshold (UET) Method. Ashgate, 1993.