Source: https://dl.ummto.dz/bitstream/handle/ummto/4229/L%E2%80%99%C3%A9laboration%20d%E2%80%99un%20plan%20marketing%20au%20sein%20d%E2%80%99une%20entreprise%20Cas%20de%20%20l%E2%80%99International%20Transit%20Transport%2C%20FILTRANS.pdf