Berg, L. R. (2008). Introductory Botany Plants, people and the environment. Thomson.
Lua i Stíl Chicago (17ú heag.)Berg, Linda R. Introductory Botany Plants, People and the Environment. Thomson, 2008.
Lua MLA (8ú heag.)Berg, Linda R. Introductory Botany Plants, People and the Environment. Thomson, 2008.
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