Cita APA (7th ed.)

Ridenour, F. (1967). So, What's the Difference? GL Regal Books, A Division of G/L Publicaitons.

Cita Chicago (17th ed.)

Ridenour, Fritz. So, What's the Difference? Glendale, CA: GL Regal Books, A Division of G/L Publicaitons, 1967.

Cita MLA (9th ed.)

Ridenour, Fritz. So, What's the Difference? GL Regal Books, A Division of G/L Publicaitons, 1967.