Warn, S., Naish, M., & Sleep, S. (2001). Changing environments: AS level geography for Edexcel B (1. publ., 5. impression.). Longman.
Citazione stile Chigago Style (17a edizione)Warn, Sue, Michael Naish, e Sue Sleep. Changing Environments: AS Level Geography for Edexcel B. 1. publ., 5. impression. Harlow: Longman, 2001.
Citatione MLA (9a ed.)Warn, Sue, et al. Changing Environments: AS Level Geography for Edexcel B. 1. publ., 5. impression. Longman, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.