Citazione Stile APA (7a Edizione)

Singapore. Ministry of Finance. (1967). Trade classification and customs tariff. Government Printing Office.

Citazione stile Chigago Style (17a edizione)

Singapore. Ministry of Finance. Trade Classification and Customs Tariff. Singapore: Government Printing Office, 1967.

Citatione MLA (9a ed.)

Singapore. Ministry of Finance. Trade Classification and Customs Tariff. Government Printing Office, 1967.