APA

United States, . (1972). Pennsylvania Avenue National Historic Site: hearing before Subcommittee on Parks and Recreation, 92d Congress, 2d session, on S. 715, S. 4002, and H.R. 10751, Sept. 21, 1972. [Washington, D.C.]: .

Chicago

United States, . 1972. Pennsylvania Avenue National Historic Site: hearing before Subcommittee on Parks and Recreation, 92d Congress, 2d session, on S. 715, S. 4002, and H.R. 10751, Sept. 21, 1972. [Washington, D.C.]: .

Harvard

United States, . (1972). Pennsylvania Avenue National Historic Site: hearing before Subcommittee on Parks and Recreation, 92d Congress, 2d session, on S. 715, S. 4002, and H.R. 10751, Sept. 21, 1972. [Washington, D.C.]: .

MLA

United States, . Pennsylvania Avenue National Historic Site: hearing before Subcommittee on Parks and Recreation, 92d Congress, 2d session, on S. 715, S. 4002, and H.R. 10751, Sept. 21, 1972. [Washington, D.C.]: . 1972.