APA (7th ed.) Citation

Porter, J., Roy, R., Werf, B. V. d., & Egli, V. The PEAR Tool: Evaluating portion sizes of food and beverages in food advertising to children using Google Street View. BMC.

Chicago Style (17th ed.) Citation

Porter, J., R. Roy, B Van der Werf, and V. Egli. The PEAR Tool: Evaluating Portion Sizes of Food and Beverages in Food Advertising to Children Using Google Street View. BMC.

MLA (9th ed.) Citation

Porter, J., et al. The PEAR Tool: Evaluating Portion Sizes of Food and Beverages in Food Advertising to Children Using Google Street View. BMC.