MULLER, W. H. (1970). Botany: A functional approach.-- ed.2. Collier-Macmillan.
Lua i Stíl Chicago (17ú heag.)MULLER, Walter H. Botany: A Functional Approach.-- Ed.2. London: Collier-Macmillan, 1970.
Lua MLA (9ú heag.)MULLER, Walter H. Botany: A Functional Approach.-- Ed.2. Collier-Macmillan, 1970.
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