APA (7th ed.) Citation

ScienceDirect (Online service). Ultrasonics. Butterworth Scientific Ltd., etc.].

Chicago Style (17th ed.) Citation

ScienceDirect (Online service). Ultrasonics. [Guildford, Eng., etc.: Butterworth Scientific Ltd., etc.].

MLA (8th ed.) Citation

ScienceDirect (Online service). Ultrasonics. Butterworth Scientific Ltd., etc.].

Warning: These citations may not always be 100% accurate.