Roper, J., Ng, M., & Pettit, C. (2023, October). Incorporating diminishing returns to opportunities in access: Development of an open-source walkability index based on multi-activity accessibility. Journal of Transport and Land Use.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Roper, Josephine, Matthew Ng, و Christopher Pettit. "Incorporating Diminishing Returns to Opportunities in Access: Development of an Open-source Walkability Index Based on Multi-activity Accessibility." Journal of Transport and Land Use Oct. 2023.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Roper, Josephine, et al. "Incorporating Diminishing Returns to Opportunities in Access: Development of an Open-source Walkability Index Based on Multi-activity Accessibility." Journal of Transport and Land Use, Oct. 2023.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.