Cita APA (7th ed.)
Paddock, W. (1973). We don't know how. Iowa State University press.
Cita Chicago (17th ed.)
Paddock, William. We Don't Know How. Iowa: Iowa State University press, 1973.
Cita MLA (9th ed.)
Paddock, William. We Don't Know How. Iowa State University press, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.