Hill, N., & Toni Setiawan. (2010). The Magic Ladder To Succes. Jogjakarta: Mitra Sejati.
Dyfyniad Arddull ChicagoHill, Napoleon, and Toni Setiawan. The Magic Ladder To Succes. Jogjakarta: Mitra Sejati, 2010.
Dyfyniad MLAHill, Napoleon, and Toni Setiawan. The Magic Ladder To Succes. Jogjakarta: Mitra Sejati, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.