Não informado. (1976). Systematic Botany. American Society of Plant Taxonomists.
Style de citation Chicago (17e éd.)Não informado. Systematic Botany. Kent, Ohio: American Society of Plant Taxonomists, 1976.
Style de citation MLA (8e éd.)Não informado. Systematic Botany. American Society of Plant Taxonomists, 1976.
Attention : ces citations peuvent ne pas être correctes à 100%.