APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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