Lua APA (7ú heag.)

Trace, J. (1985). Style and strategy of the business letter. Prentice-Hall.

Lua i Stíl Chicago (17ú heag.)

Trace, Jacqueline. Style and Strategy of the Business Letter. Englewood Cliffs, N.J: Prentice-Hall, 1985.

Lua MLA (9ú heag.)

Trace, Jacqueline. Style and Strategy of the Business Letter. Prentice-Hall, 1985.

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