Bilham-Boult, A., & Orrell, K. (1999). People, places and themes: GCSE geography for the Bristol Project (1. publ.). Heinemann.
Citazione stile Chigago Style (17a edizione)Bilham-Boult, Alan, e Keith Orrell. People, Places and Themes: GCSE Geography for the Bristol Project. 1. publ. Oxford [u.a.]: Heinemann, 1999.
Citatione MLA (9a ed.)Bilham-Boult, Alan, e Keith Orrell. People, Places and Themes: GCSE Geography for the Bristol Project. 1. publ. Heinemann, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.