Cita APA (7a ed.)

Dreikurs, R. (1999). The challenge of marriage. Accelerated Development.

Cita Chicago Style (17a ed.)

Dreikurs, Rudolf. The Challenge of Marriage. Philadelphia: Accelerated Development, 1999.

Cita MLA (9a ed.)

Dreikurs, Rudolf. The Challenge of Marriage. Accelerated Development, 1999.