61st Congress, 2nd session, beginning December 6, 1909. Official Congressional Directory for the use of the United States Congress, compiled under the direction of the Joint Committee on Printing by A.J. Halford. Second edition. Corrections made to January 17, 1910
MLA
Halford, A.J. 61st Congress, 2nd Session, Beginning December 6, 1909. Official Congressional Directory for the Use of the United States Congress, Compiled Under the Direction of the Joint Committee On Printing by A.j. Halford. Second Edition. Corrections Made to January 17, 1910. Senate Document / 61st Congress, 2nd Session. Senate. Washington, DC, 1910
APA, 7th edition
Halford, A. (1910). 61st Congress, 2nd session, beginning December 6, 1909. Official Congressional Directory for the use of the United States Congress, compiled under the direction of the Joint Committee on Printing by A.J. Halford. Second edition. Corrections made to January 17, 1910. Senate document / 61st Congress, 2nd session. Senate. Washington, DC
Chicago, 17th edition
Halford, A.J. 61st Congress, 2nd session, beginning December 6, 1909. Official Congressional Directory for the use of the United States Congress, compiled under the direction of the Joint Committee on Printing by A.J. Halford. Second edition. Corrections made to January 17, 1910. Senate document / 61st Congress, 2nd session. Senate. Washington, DC, 1910