Guia, E. O. (1972). A comparative study of fertiliser distribution systems. Paris: Devepment Centre of the Organisation for Economic Co-operation and Development.
استشهاد بنمط شيكاغوGuia, Eric O.de. A Comparative Study of Fertiliser Distribution Systems. Paris: Devepment Centre of the Organisation for Economic Co-operation and Development, 1972.
MLA استشهادGuia, Eric O.de. A Comparative Study of Fertiliser Distribution Systems. Paris: Devepment Centre of the Organisation for Economic Co-operation and Development, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.