APA

United States, . (1987). Revenue estimate: Panama Canal Commission estimated revenue for fiscal year 1988. [Washington, D.C: .

Chicago

United States, . 1987. Revenue estimate: Panama Canal Commission estimated revenue for fiscal year 1988. [Washington, D.C: .

Harvard

United States, . (1987). Revenue estimate: Panama Canal Commission estimated revenue for fiscal year 1988. [Washington, D.C: .

MLA

United States, . Revenue estimate: Panama Canal Commission estimated revenue for fiscal year 1988. [Washington, D.C: . 1987.