Hall, M. (1987). Mo'-ti-va-tion: How to be a positive force in a negative world. Good-News encounters, inc.
Dyfyniad Arddull ChicagoHall, Michael. Mo'-ti-va-tion: How to Be a Positive Force in a Negative World. Missouri: Good-News encounters, inc, 1987.
Dyfyniad MLAHall, Michael. Mo'-ti-va-tion: How to Be a Positive Force in a Negative World. Good-News encounters, inc, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.