David, D., & Davidescu, V. (1982). Evaluation of fertility by plant and soil analysis. Abacus Press & Tunbridge Wells.
Citazione stile Chigago Style (17a edizione)David, Davidescu, e Velicica Davidescu. Evaluation of Fertility by Plant and Soil Analysis. England: Abacus Press & Tunbridge Wells, 1982.
Citatione MLA (9a ed.)David, Davidescu, e Velicica Davidescu. Evaluation of Fertility by Plant and Soil Analysis. Abacus Press & Tunbridge Wells, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.