Cita APA (7th ed.)

Peter, H. (1998). Workbook on contigration (1st edition.). Oxford and IBH.

Cita Chicago (17th ed.)

Peter, Hansen. Workbook on Contigration. 1st edition. New York: Oxford and IBH, 1998.

Cita MLA (9th ed.)

Peter, Hansen. Workbook on Contigration. 1st edition. Oxford and IBH, 1998.