Gaya APA

hart, S, L, ;, E, G, A. (). Improving impact assesment : increasing the relevance and utilization of scientific and technical information . London: westview press.

Gaya MLA

hart, Shuart, L., ;, Enk,, Gordon, A.. "Improving impact assesment : increasing the relevance and utilization of scientific and technical information". London: westview press, . Text.