Herring, E. P. 1. (1967). Group representation before Congress. Russell & Russell.
Cita Chicago (17th ed.)Herring, Edward Pendleton 1903. Group Representation Before Congress. New York: Russell & Russell, 1967.
Cita MLA (9th ed.)Herring, Edward Pendleton 1903. Group Representation Before Congress. Russell & Russell, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.