APA

hanson j., . (1979). the structure of modern commerce. london: the english language book society.

Chicago

hanson j.l, . 1979. the structure of modern commerce. london: the english language book society.

Harvard

hanson j., . (1979). the structure of modern commerce. london: the english language book society.

MLA

hanson j.l, . the structure of modern commerce. london: the english language book society. 1979.