Gaya APA

Greener, M., Swanson, C, P. (1971). The penguin dictionary of commerce . Middlesex: Middlesex: Penguin Books; 1971.

Gaya MLA

Greener, Michael., Swanson, Carl, P.. "The penguin dictionary of commerce". Middlesex: Middlesex: Penguin Books; 1971, 1971. Text.