APA

Erwin C., Volow M. & Gray B. (1973). Psychophysiologic indices of drowsiness. New York: Society of Automotive Engineers. SAE technical paper 73 01 22.

Chicago

Erwin CW, Volow MR and Gray B. 1973. Psychophysiologic indices of drowsiness. New York: Society of Automotive Engineers. SAE technical paper 73 01 22.

Harvard

Erwin C., Volow M. and Gray B. (1973). Psychophysiologic indices of drowsiness. New York: Society of Automotive Engineers. SAE technical paper 73 01 22.

MLA

Erwin CW, Volow MR and Gray B. Psychophysiologic indices of drowsiness. New York: Society of Automotive Engineers. SAE technical paper 73 01 22. 1973.