APA (7th ed.) Citation

Beckwith, H. Selling the Invisible. Warner Books.

Chicago Style (17th ed.) Citation

Beckwith, Harry. Selling the Invisible. Warner Books.

MLA (9th ed.) Citation

Beckwith, Harry. Selling the Invisible. Warner Books.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.