Cita APA (7a ed.)
King, F., & Cree, D. (1992). English Business Letters (2. Edition.). Longman Group UK.
Cita Chicago Style (17a ed.)
King, F.W, y D.Ann Cree. English Business Letters. 2. Edition. Harlow: Longman Group UK, 1992.
Cita MLA (9a ed.)
King, F.W, y D.Ann Cree. English Business Letters. 2. Edition. Longman Group UK, 1992.
Precaución: Estas citas no son 100% exactas.