Pengaruh kedekatan hubungan antara pemberi dan penerima tindakan baik terhadap kebahagiaan = The effect of closeness between giver and receiver act of kindness on happiness

The Conquest of happiness / Bertrand Russell

Stability of happiness : theories and evidence on whether happiness can change / edited by Kennon M. Sheldon, Richard E. Lucas

Kebahagiaan yang membebaskan : menghidupkan lentera di dalam diri

All you wanted to know about happiness/ Vikas Malkani