Zarrella, D. (2013). The science of marketing: When to tweet, what to post, how to blog, and other proven strategies. Hoboken, New Jersey: John Wiley & Sons, Inc.
Trích dẫn kiểu ChicagoZarrella, Dan. The Science of Marketing: When to Tweet, What to Post, How to Blog, and Other Proven Strategies. Hoboken, New Jersey: John Wiley & Sons, Inc, 2013.
Trích dẫn MLAZarrella, Dan. The Science of Marketing: When to Tweet, What to Post, How to Blog, and Other Proven Strategies. Hoboken, New Jersey: John Wiley & Sons, Inc, 2013.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.