Cita APA (7a ed.)

Enoch Stumpf, S. (1971). History and problems. McGraw Hill.

Cita Chicago Style (17a ed.)

Enoch Stumpf, Samuel. History and Problems. New York, Estados Unidos: McGraw Hill, 1971.

Cita MLA (9a ed.)

Enoch Stumpf, Samuel. History and Problems. McGraw Hill, 1971.