APA

United States, . (1986). Postal service: acceptance procedures for bulk mailings : further improvements needed. [Washington, D.C: .

Chicago

United States, . 1986. Postal service: acceptance procedures for bulk mailings : further improvements needed. [Washington, D.C: .

Harvard

United States, . (1986). Postal service: acceptance procedures for bulk mailings : further improvements needed. [Washington, D.C: .

MLA

United States, . Postal service: acceptance procedures for bulk mailings : further improvements needed. [Washington, D.C: . 1986.