Cita APA (7a ed.)

Goodman, G. S. (2019). Selling is so easy, it's hard: 77 ways salespeople shoot themselves in the wallet. G & D Media.

Cita Chicago Style (17a ed.)

Goodman, Gary S. Selling Is so Easy, It's Hard: 77 Ways Salespeople Shoot Themselves in the Wallet. New York: G & D Media, 2019.

Cita MLA (8a ed.)

Goodman, Gary S. Selling Is so Easy, It's Hard: 77 Ways Salespeople Shoot Themselves in the Wallet. G & D Media, 2019.