Citazione Stile APA (7a Edizione)

Philippines (Republic) & Central Book Supply, Inc. (1971). Philippine tariff and customs laws (2nd ed.). [s.n.].

Citazione stile Chigago Style (17a edizione)

Philippines (Republic) e Inc Central Book Supply. Philippine Tariff and Customs Laws. 2nd ed. Manila: [s.n.], 1971.

Citatione MLA (9a ed.)

Philippines (Republic) e Inc Central Book Supply. Philippine Tariff and Customs Laws. 2nd ed. [s.n.], 1971.