Gaya APA
Sieverding, E. (1991).
Vesicular-Arbuscular Mycorrhiza Management in Tropical Agrosystems .
Eschborn:
Technical Cooperation.
Gaya MLA
Sieverding, Ewald.
"Vesicular-Arbuscular Mycorrhiza Management in Tropical Agrosystems".
Eschborn:
Technical Cooperation,
1991.
Text.