James, H. F., Hopkin, J. M., & James, H. F. (1990). Competition between bus companies in the St. Austell area. Transport and Road Research Laboratory.
Chicago-Zitierstil (17. Ausg.)James, Helen F., Jean M. Hopkin, und Helen F. James. Competition Between Bus Companies in the St. Austell Area. Crowthorne: Transport and Road Research Laboratory, 1990.
MLA-Zitierstil (9. Ausg.)James, Helen F., et al. Competition Between Bus Companies in the St. Austell Area. Transport and Road Research Laboratory, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.