APA

International Standard, Draft International Standard & ISO/DIS 3744. (1990). Acoustics - Determination of sound power levels of noise sources - Engineering method employing an enveloping measurement surface in an essentially free field over a reflecting plane. Geneve: International Standard.

Chicago

International Standard, Draft International Standard and ISO/DIS 3744. 1990. Acoustics - Determination of sound power levels of noise sources - Engineering method employing an enveloping measurement surface in an essentially free field over a reflecting plane. Geneve: International Standard.

Harvard

International Standard, Draft International Standard and ISO/DIS 3744. (1990). Acoustics - Determination of sound power levels of noise sources - Engineering method employing an enveloping measurement surface in an essentially free field over a reflecting plane. Geneve: International Standard.

MLA

International Standard, Draft International Standard and ISO/DIS 3744. Acoustics - Determination of sound power levels of noise sources - Engineering method employing an enveloping measurement surface in an essentially free field over a reflecting plane. Geneve: International Standard. 1990.