Cita APA (7th ed.)

Cassidy, D. (1993). It`s when you sell that counts. Vision Books.

Cita Chicago (17th ed.)

Cassidy, Donald. It`s When You Sell That Counts. New Delhi: Vision Books, 1993.

Cita MLA (9th ed.)

Cassidy, Donald. It`s When You Sell That Counts. Vision Books, 1993.