Ettema, D., & Timmermans, H. J. P. (1997). Activity-based approaches to travel analysis. Pergamon.
Lua i Stíl Chicago (17ú heag.)Ettema, Dick, agus H. J. P. Timmermans. Activity-based Approaches to Travel Analysis. [S.l.]: Pergamon, 1997.
Lua MLA (8ú heag.)Ettema, Dick, agus H. J. P. Timmermans. Activity-based Approaches to Travel Analysis. Pergamon, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.