Não informado. (1987). Miscellaneous Publications of the University of Utrecht Herbarium. University of Utrecht, Institute of Systematic Botany.
Čikaški stil citiranja (17. izdanje)Não informado. Miscellaneous Publications of the University of Utrecht Herbarium. Utrecht, Holanda: University of Utrecht, Institute of Systematic Botany, 1987.
MLA način citiranja (8. izdanje)Não informado. Miscellaneous Publications of the University of Utrecht Herbarium. University of Utrecht, Institute of Systematic Botany, 1987.
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