APA Citatie

Pfeiffer, E. Soil fetility: Renewal and preservation: Biodynamic farming and gardening.1.

Chicago Style citaat

Pfeiffer, Ehrenfried. Soil Fetility: Renewal and Preservation: Biodynamic Farming and Gardening.1.

MLA citatie

Pfeiffer, Ehrenfried. Soil Fetility: Renewal and Preservation: Biodynamic Farming and Gardening.1.

Let op: Deze citaties zijn niet altijd 100% accuraat.