Matthews, A. (1997). Being Happy!: Kiat hidup tenteram dan bahagia. Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationMatthews, Andres. Being Happy!: Kiat Hidup Tenteram Dan Bahagia. Gramedia Pustaka Utama, 1997.
MLA (8th ed.) CitationMatthews, Andres. Being Happy!: Kiat Hidup Tenteram Dan Bahagia. Gramedia Pustaka Utama, 1997.
Warning: These citations may not always be 100% accurate.