Dyfyniad APA

Hewett, D., & Williams, D. (2010). Sound propagation in an urban environment.

Dyfyniad Arddull Chicago

Hewett, D., and D. Williams. Sound Propagation in an Urban Environment. 2010.

Dyfyniad MLA

Hewett, D., and D. Williams. Sound Propagation in an Urban Environment. 2010.

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