Birt, I. (2005). Marketing and promoting your business: Products and services. Australia: Pearson Education.
শিকাগো স্টাইলে সাইটেশনBirt, Ian. Marketing and Promoting Your Business: Products and Services. Australia: Pearson Education, 2005.
এমএলএ সাইটেশনBirt, Ian. Marketing and Promoting Your Business: Products and Services. Australia: Pearson Education, 2005.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.