APA

Whitehead G., Whiteh D. H., . (1982). Pitman business correspondence. London: Pitman books Ltd.

Chicago

Whitehead Geoffrey, Whiteh David H, . 1982. Pitman business correspondence. London: Pitman books Ltd.

Harvard

Whitehead G., Whiteh D. H., . (1982). Pitman business correspondence. London: Pitman books Ltd.

MLA

Whitehead Geoffrey, Whiteh David H, . Pitman business correspondence. London: Pitman books Ltd. 1982.