Cita APA (7th ed.)

Nauheim, F. (1979). Salesman`s complete model letter handbook. Taraporevala.

Cita Chicago (17th ed.)

Nauheim, Ferd. Salesman`s Complete Model Letter Handbook. Bombay: Taraporevala, 1979.

Cita MLA (9th ed.)

Nauheim, Ferd. Salesman`s Complete Model Letter Handbook. Taraporevala, 1979.