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.