FAO. (1997). International standards for phytosanitary measures: Export certification systems. Rome, Italy: FAO.
Stile di citazione ChicagoFAO. International Standards for Phytosanitary Measures: Export Certification Systems. Rome, Italy: FAO, 1997.
Citazione MLAFAO. International Standards for Phytosanitary Measures: Export Certification Systems. Rome, Italy: FAO, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.