Cita APA (7th ed.)
Brandt, H., & Skinner, K. L. (1998). Heart of the problem workbook. Broadman & Holman.
Cita Chicago (17th ed.)
Brandt, Henry, i Kerry L. Skinner. Heart of the Problem Workbook. Nashville, Tenessee: Broadman & Holman, 1998.
Cita MLA (9th ed.)
Brandt, Henry, i Kerry L. Skinner. Heart of the Problem Workbook. Broadman & Holman, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.