Lua APA (7ú heag.)

Monippally, M. (1997). The craft of business letter writing. TMH.

Lua i Stíl Chicago (17ú heag.)

Monippally, Mathew. The Craft of Business Letter Writing. New delhi: TMH, 1997.

Lua MLA (9ú heag.)

Monippally, Mathew. The Craft of Business Letter Writing. TMH, 1997.

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