Franklin

MLA

Digest of the United States Tariff and Customs Laws, an Alphabetical Schedule of Rates of Duties: and an Appendix (7th Ed.). .

APA

Digest of the United States Tariff and Customs Laws, an Alphabetical Schedule of Rates of Duties: and an Appendix (7th ed.). .

Chicago

Digest of the United States Tariff and Customs Laws, an Alphabetical Schedule of Rates of Duties: and an Appendix (7th Ed.).