Dyfyniad APA

234249 Iqbal, M. A., Willson, T. K., & Thomas, R. J. (1977). Control of noise in ventilation systems: A designers' guide. London: E and F N Spon.

Dyfyniad Arddull Chicago

234249 Iqbal, M. A., T. K. Willson, and R. J. Thomas. Control of Noise in Ventilation Systems: A Designers' Guide. London: E and F N Spon, 1977.

Dyfyniad MLA

234249 Iqbal, M. A., et al. Control of Noise in Ventilation Systems: A Designers' Guide. London: E and F N Spon, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.