Cita APA (7th ed.)

THE COMPLETE .. (1988). The complete book of contemporary business letters. Round Lake Pub.

Cita Chicago (17th ed.)

THE COMPLETE .. The Complete Book of Contemporary Business Letters. Connecticut: Round Lake Pub, 1988.

Cita MLA (9th ed.)

THE COMPLETE .. The Complete Book of Contemporary Business Letters. Round Lake Pub, 1988.