APA

Butterworth J. E. 1., .The county superintendent in the United States / by Julian E. Butterworth professor of Rural Education, Cornell University. s.l. : United States Department of the Interior office of education, 1932: .

Chicago

Butterworth Julian E 1884-1961, .The county superintendent in the United States / by Julian E. Butterworth professor of Rural Education, Cornell University. s.l. : United States Department of the Interior office of education, 1932: .

Harvard

Butterworth J. E. 1., .The county superintendent in the United States / by Julian E. Butterworth professor of Rural Education, Cornell University. s.l. : United States Department of the Interior office of education, 1932: .

MLA

Butterworth Julian E 1884-1961, .s.l. : United States Department of the Interior office of education, 1932: . .