Petruzzelliz Tom. (2008). Get Noticed... Get Referrals: Build Your Client Base and Your Business by Making a Name For Yourself. American: Mc Graw Hill Higher Education.
Παραπομπή Chicago StylePetruzzelliz Tom. Get Noticed... Get Referrals: Build Your Client Base and Your Business By Making a Name For Yourself. American: Mc Graw Hill Higher Education, 2008.
Παραπομπή MLAPetruzzelliz Tom. Get Noticed... Get Referrals: Build Your Client Base and Your Business By Making a Name For Yourself. American: Mc Graw Hill Higher Education, 2008.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.