Cita APA (7a ed.)
Johnson, H. (1990). Professional communications - for a change. Prentice Hall.
Cita Chicago Style (17a ed.)
Johnson, Hans. Professional Communications - for a Change. New york: Prentice Hall, 1990.
Cita MLA (9a ed.)
Johnson, Hans. Professional Communications - for a Change. Prentice Hall, 1990.
Precaución: Estas citas no son 100% exactas.