Citazione APA

Saylor, R. B. (1950). An economic survey of Venango County, Pennsylvania.

Stile di citazione Chicago

Saylor, Roger B. An Economic Survey of Venango County, Pennsylvania. [State College, Pa. : s.n, 1950.

Citazione MLA

Saylor, Roger B. An Economic Survey of Venango County, Pennsylvania. 1950.