Troy, L. (1998). Almanac of business and industrial financial ratios. Paramus : Prentice Hall.
Dyfyniad Arddull ChicagoTroy, Leo. Almanac of Business and Industrial Financial Ratios. Paramus : Prentice Hall, 1998.
Dyfyniad MLATroy, Leo. Almanac of Business and Industrial Financial Ratios. Paramus : Prentice Hall, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.