Chua, J. L. (2012). Laughter yoga: LOL your way to wellness. Cruising.
Chicago Style aipamenaChua, Johannes L. "Laughter Yoga: LOL Your Way to Wellness." Cruising 2012.
MLA aipamenaChua, Johannes L. "Laughter Yoga: LOL Your Way to Wellness." Cruising, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.