Cita APA (7th ed.)

Eckersley, C. (1952). English comercial practice and correspondence. Lengmans.

Cita Chicago (17th ed.)

Eckersley, C.E. English Comercial Practice and Correspondence. Lengmans, 1952.

Cita MLA (9th ed.)

Eckersley, C.E. English Comercial Practice and Correspondence. Lengmans, 1952.