Παραπομπή σε μορφή APA (7η εκδ.)

OKALEBO, J. (1993). Laboratory Methods Of Soil And Plant Analysis/j. Robert Okalebo And Kenneth W. Gathua. UNESCO-ROSTA.

Παραπομπή σε μορφή Chicago (17η εκδ.)

OKALEBO, J.R. Laboratory Methods Of Soil And Plant Analysis/j. Robert Okalebo And Kenneth W. Gathua. UNESCO-ROSTA, 1993.

Παραπομπή σε μορφή MLA (8th εκδ.)

OKALEBO, J.R. Laboratory Methods Of Soil And Plant Analysis/j. Robert Okalebo And Kenneth W. Gathua. UNESCO-ROSTA, 1993.