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Dyfyniad Arddull ChicagoChua, Johannes L. "Laughter Yoga: LOL Your Way to Wellness." Cruising 2012.
Dyfyniad MLAChua, Johannes L. "Laughter Yoga: LOL Your Way to Wellness." Cruising, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.