Cita APA (7a ed.)

Gordon, D. (1982). Basic business letter ([Rep. 1982].). Heinemann Educational Books.

Cita Chicago Style (17a ed.)

Gordon, D.I. Basic Business Letter. [Rep. 1982]. London: Heinemann Educational Books, 1982.

Cita MLA (9a ed.)

Gordon, D.I. Basic Business Letter. [Rep. 1982]. Heinemann Educational Books, 1982.