APA

Singh G. P., Schmalzel J. L., Udpa S. S. & Nondestructive testing information analysis center S. A. T. (1991). The application of digital signal processing and pattern recognition to ultrasonic and electromagnetic nondestructive testing and evaluation: a state of the art review. San Antonio, Tex: NTIAC.

Chicago

Singh G P, Schmalzel J L, Udpa S S and Nondestructive testing information analysis center San Antonio Tex.^pUS. 1991. The application of digital signal processing and pattern recognition to ultrasonic and electromagnetic nondestructive testing and evaluation: a state of the art review. San Antonio, Tex: NTIAC.

Harvard

Singh G. P., Schmalzel J. L., Udpa S. S. and Nondestructive testing information analysis center S. A. T. (1991). The application of digital signal processing and pattern recognition to ultrasonic and electromagnetic nondestructive testing and evaluation: a state of the art review. San Antonio, Tex: NTIAC.

MLA

Singh G P, Schmalzel J L, Udpa S S and Nondestructive testing information analysis center San Antonio Tex.^pUS. The application of digital signal processing and pattern recognition to ultrasonic and electromagnetic nondestructive testing and evaluation: a state of the art review. San Antonio, Tex: NTIAC. 1991.