Παραπομπή APA

G Schroth. (2003). Trees, crops and soil fertility; concepts and research methods. CABI.

Παραπομπή Chicago Style

G Schroth. Trees, Crops and Soil Fertility; Concepts and Research Methods. UK: CABI, 2003.

Παραπομπή MLA

G Schroth. Trees, Crops and Soil Fertility; Concepts and Research Methods. CABI, 2003.