APA (7e ed.) Bronvermelding

David, D., & Davidescu, V. (1982). Evaluation of fertility by plant and soil analysis. Abacus Press & Tunbridge Wells.

Chicago (17e ed.) Bronvermelding

David, Davidescu, en Velicica Davidescu. Evaluation of Fertility by Plant and Soil Analysis. England: Abacus Press & Tunbridge Wells, 1982.

MLA (9e ed.) Bronvermelding

David, Davidescu, en Velicica Davidescu. Evaluation of Fertility by Plant and Soil Analysis. Abacus Press & Tunbridge Wells, 1982.