University of the Philippines (Los Banos). College of Agriculture & Department of Soils. A laboratory manual in soil science. s.n.
Citazione stile Chigago Style (17a edizione)University of the Philippines (Los Banos). College of Agriculture e Department of Soils. A Laboratory Manual in Soil Science. [Los Banos, Laguna: s.n.
Citatione MLA (9a ed.)University of the Philippines (Los Banos). College of Agriculture e Department of Soils. A Laboratory Manual in Soil Science. s.n.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.