APA

Jacobs R., Shapiro K. & Ray W. (1983). Operator absence in the transit industry. University Park, PA: Pennsylvania State University. Pennsylvania Transportation Institute. PTI report 8320.

Chicago

Jacobs RR, Shapiro KL and Ray WJ. 1983. Operator absence in the transit industry. University Park, PA: Pennsylvania State University. Pennsylvania Transportation Institute. PTI report 8320.

Harvard

Jacobs R., Shapiro K. and Ray W. (1983). Operator absence in the transit industry. University Park, PA: Pennsylvania State University. Pennsylvania Transportation Institute. PTI report 8320.

MLA

Jacobs RR, Shapiro KL and Ray WJ. Operator absence in the transit industry. University Park, PA: Pennsylvania State University. Pennsylvania Transportation Institute. PTI report 8320. 1983.