National Botanic Garden of Belgium\nNationale Plantentuin van België. (1999). Systematics and Geography of Plants. National Botanic Gardens.
Čikaški stil citiranja (17. izdanje)National Botanic Garden of Belgium\nNationale Plantentuin van België. Systematics and Geography of Plants. Meise, Belgica: National Botanic Gardens, 1999.
MLA način citiranja (8. izdanje)National Botanic Garden of Belgium\nNationale Plantentuin van België. Systematics and Geography of Plants. National Botanic Gardens, 1999.
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