Plimmer, D., Parkinson, E., & Carlton, K. (1996). The environment: A primary teacher's guide. Cassell.
Lua i Stíl Chicago (17ú heag.)Plimmer, Don, Eric Parkinson, agus Kevin Carlton. The Environment: A Primary Teacher's Guide. London ; New York, NY: Cassell, 1996.
Lua MLA (8ú heag.)Plimmer, Don, et al. The Environment: A Primary Teacher's Guide. Cassell, 1996.
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