APA (7th ed.) Citation

Wu, K., Wu, M., An, Z., & Jiao, H. Evaluation of tourism ecological security and its obstacles in semi-arid river valley urban: A case study of Lanzhou, China. Nature Portfolio.

Chicago Style (17th ed.) Citation

Wu, Kejun, Mengtao Wu, Zhihai An, and Hui Jiao. Evaluation of Tourism Ecological Security and Its Obstacles in Semi-arid River Valley Urban: A Case Study of Lanzhou, China. Nature Portfolio.

MLA (9th ed.) Citation

Wu, Kejun, et al. Evaluation of Tourism Ecological Security and Its Obstacles in Semi-arid River Valley Urban: A Case Study of Lanzhou, China. Nature Portfolio.