Carroll, D. M., Evans, R., & Bendelow, V. C. (1977). Air photo-interpretation for soil mapping. Soil Survey.
Cita Chicago Style (17a ed.)Carroll, D. M., R. Evans, y V. C. Bendelow. Air Photo-interpretation for Soil Mapping. Harpenden: Soil Survey, 1977.
Cita MLA (9a ed.)Carroll, D. M., et al. Air Photo-interpretation for Soil Mapping. Soil Survey, 1977.
Precaución: Estas citas no son 100% exactas.