Ng. (2022). Happinessâ€"Concept, Measurement and Promotion (1.). Springer Singapore.
Lua i Stíl Chicago (17ú heag.)Ng. Happinessâ€"Concept, Measurement and Promotion. 1. Springer Singapore, 2022.
Lua MLA (8ú heag.)Ng. Happinessâ€"Concept, Measurement and Promotion. 1. Springer Singapore, 2022.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.