APA Citation

ProQuest (Firm), Gutzman, A. D., Muller, A., Pfledderer, D., & Gibbons, T. (2002). Buyers' guide to search engine optimization firms: Who should you hire? how much should you pay? (2nd ed.). Portsmouth, R.I.: MarketingSherpa.

Chicago Style Citation

ProQuest (Firm), Alexis D. Gutzman, Anthony Muller, Donna Pfledderer, and Tim Gibbons. Buyers' Guide to Search Engine Optimization Firms: Who Should You Hire? How Much Should You Pay? 2nd ed. Portsmouth, R.I.: MarketingSherpa, 2002.

MLA Citation

ProQuest (Firm), et al. Buyers' Guide to Search Engine Optimization Firms: Who Should You Hire? How Much Should You Pay? 2nd ed. Portsmouth, R.I.: MarketingSherpa, 2002.

Warning: These citations may not always be 100% accurate.