Pring, M. J. (1993). Martin Pring on market momentum. McGraw-Hill.
Dyfyniad Arddull ChicagoPring, Martin J. Martin Pring on Market Momentum. New York: McGraw-Hill, 1993.
Dyfyniad MLAPring, Martin J. Martin Pring on Market Momentum. McGraw-Hill, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.