Cita APA (7a ed.)

Frisoni, G. (1918). A Manual of English Commercial Correspondence (3a ediz.). U.Hoepli.

Cita Chicago Style (17a ed.)

Frisoni, Gaetano. A Manual of English Commercial Correspondence. 3a ediz. Milano: U.Hoepli, 1918.

Cita MLA (9a ed.)

Frisoni, Gaetano. A Manual of English Commercial Correspondence. 3a ediz. U.Hoepli, 1918.