APA citiranje

Du Yaping. (1998). Economy and environment program for Southeast Asia: Application of Contingent Valuation and Travel Cost Methods,The value of water quality for recreation in East Lake, Wuhan, China. Singapore: EEPSEA.

Trích dẫn kiểu Chicago

Du Yaping. Economy and Environment Program for Southeast Asia: Application of Contingent Valuation and Travel Cost Methods,The Value of Water Quality for Recreation in East Lake, Wuhan, China. Singapore: EEPSEA, 1998.

MLA citiranje

Du Yaping. Economy and Environment Program for Southeast Asia: Application of Contingent Valuation and Travel Cost Methods,The Value of Water Quality for Recreation in East Lake, Wuhan, China. Singapore: EEPSEA, 1998.