Tzu-Yuan Stessa Chao, Yi Sun, 2025. Planning for Age-Friendly Cities and Communities in East Asia. In:  United Nations Environment Programme. Frontiers 2025: The Weight of Time – Facing a new age of challenges for people and ecosystems. Nairobi. pp.49-72 (ISBN 978-92-807-4224-4)

Tzu-Yuan Stessa Chao, Yi Sun, Tzuhan Hung 2025. Planning for the Age-friendly Cities and Communities in East Asia: The Oriental Paradigm. In:  Matthias Drilling & Fabian Neuhaus. eds.  Ageing, and Urban Planning, Routledge, New York. (ISBN 9780367700676)

Yi Sun, Tzu-Yuan Stessa Chao, Jia Ling, 2022.05. Glocalization, the city and variegated age-friendly urbanism: A Case Study of Hong Kong and Taiwan, Handbook of Culture and Glocalization, Edward Elgar pp.156-170 (ISBN 9781839109003)

Yi Sun, Tzu-Yuan Stessa Chao, Doreen W.H. Ou & Jean Woo, 2022. The Age-friendly Movement in an Asian Context. In: Christie Gardiner & Eileen Webb eds. The Age-Friendly Lens, Routledge, London. pp.89-104 (ISBN 9781003038658)(DOI: 10.4324/9781003038658-8)