(1988). Imports under items 806.30 and 807.00 of the tariff schedules of the United States, 1984 -87. Washington: Usitic Publication.
Παραπομπή Chicago StyleImports Under Items 806.30 and 807.00 of the Tariff Schedules of the United States, 1984 -87. Washington: Usitic Publication, 1988.
Παραπομπή MLAImports Under Items 806.30 and 807.00 of the Tariff Schedules of the United States, 1984 -87. Washington: Usitic Publication, 1988.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.