APA (7th ed.) Citation

Wakefield, R. P. (1926). Shipment of samples and advertising matter to Europe. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Wakefield, Roberta P. Shipment of Samples and Advertising Matter to Europe. [Washington?]: U.S. Government Printing Office, 1926.

MLA (9th ed.) Citation

Wakefield, Roberta P. Shipment of Samples and Advertising Matter to Europe. U.S. Government Printing Office, 1926.