APA

United States, Schwartz C. F. & Graham R. E. (1956). Personal income by States since 1929: a supplement to the Survey of current business. Washington: U.S. Govt. Print. Off.

Chicago

United States, Schwartz Charles F and Graham Robert E. 1956. Personal income by States since 1929: a supplement to the Survey of current business. Washington: U.S. Govt. Print. Off.

Harvard

United States, Schwartz C. F. and Graham R. E. (1956). Personal income by States since 1929: a supplement to the Survey of current business. Washington: U.S. Govt. Print. Off.

MLA

United States, Schwartz Charles F and Graham Robert E. Personal income by States since 1929: a supplement to the Survey of current business. Washington: U.S. Govt. Print. Off. 1956.