Gaya APA

Hoel, L, A., Lepper, R, L. (1968). Urban Rapid Transit Concepts And Evaluation . Pittsburgh: Carnegie-Mellon University.

Gaya MLA

Hoel, Lester, A.., Lepper, Ribert, L.. "Urban Rapid Transit Concepts And Evaluation". Pittsburgh: Carnegie-Mellon University, 1968. Text.