APA (7th ed.) Citation

Grubben, G. J. H. Plant resources of tropical Africa. PROTA Foundation [u.a.].

Chicago Style (17th ed.) Citation

Grubben, Gerardus J. H. Plant Resources of Tropical Africa. Wageningen: PROTA Foundation [u.a.].

MLA (9th ed.) Citation

Grubben, Gerardus J. H. Plant Resources of Tropical Africa. PROTA Foundation [u.a.].