APA (7e ed.) Bronvermelding

SETHI SUBHASH C. (2003). TWENTY FIVE MINTUTES TO ENHANCE YOUR CUSTOMER SELLING. INDIANA BOOKS.

Chicago (17e ed.) Bronvermelding

SETHI SUBHASH C. TWENTY FIVE MINTUTES TO ENHANCE YOUR CUSTOMER SELLING. NEW DELHI: INDIANA BOOKS, 2003.

MLA (9e ed.) Bronvermelding

SETHI SUBHASH C. TWENTY FIVE MINTUTES TO ENHANCE YOUR CUSTOMER SELLING. INDIANA BOOKS, 2003.