APA

Hume G. B. J. E., . (1967). Manual of commercial correspondence. : Sir Isaac Pitman & Sons Ltd., London.

Chicago

Hume G Bayley J E, . 1967. Manual of commercial correspondence. : Sir Isaac Pitman & Sons Ltd., London.

Harvard

Hume G. B. J. E., . (1967). Manual of commercial correspondence. : Sir Isaac Pitman & Sons Ltd., London.

MLA

Hume G Bayley J E, . Manual of commercial correspondence. : Sir Isaac Pitman & Sons Ltd., London. 1967.