Schuller, R. H. (1988). Success is never ending, failure is never final. T. Nelson Publishers, Bantam Books.
Dyfyniad Arddull ChicagoSchuller, Robert H. Success Is Never Ending, Failure Is Never Final. Nashville : New York: T. Nelson Publishers, Bantam Books, 1988.
Dyfyniad MLASchuller, Robert H. Success Is Never Ending, Failure Is Never Final. T. Nelson Publishers, Bantam Books, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.