Akers, Timothy, Mary Alabanza Akers, and Richard Sowell. “A Conceptual Model for Planning and Designing Healthy Urban Landscapes in the Third World: A Study of Street Vendors in the Philippines”. Landscape Review 9, no. 1 (June 1, 2004): 45–49. Accessed November 26, 2022. https://journals.lincoln.ac.nz/index.php/lr/article/view/147.