Citazione APA

Riegel, R. E. (1948). Tests for United States of America. C. Scribner's Sons.

Stile di citazione Chicago

Riegel, Robert Edgar. Tests for United States of America. New York : Chicago [etc.]: C. Scribner's Sons, 1948.

Citazione MLA

Riegel, Robert Edgar. Tests for United States of America. C. Scribner's Sons, 1948.