Redcar and Cleveland, Borough Council (2011). "Kirkleatham Conservation Area Appraisal"(PDF). www.redcar-cleveland.gov.uk/. Archived(PDF) from the original on January 20, 2022. Retrieved February 22, 2021.
stanford.edu
plato.stanford.edu
Hacker-Wright, John (2019), "Philippa Foot", in Zalta, Edward N. (ed.), The Stanford Encyclopedia of Philosophy (Fall 2019 ed.), Metaphysics Research Lab, Stanford University, archived from the original on 2024-05-17, retrieved 2021-02-22
Redcar and Cleveland, Borough Council (2011). "Kirkleatham Conservation Area Appraisal"(PDF). www.redcar-cleveland.gov.uk/. Archived(PDF) from the original on January 20, 2022. Retrieved February 22, 2021.
Hacker-Wright, John (2019), "Philippa Foot", in Zalta, Edward N. (ed.), The Stanford Encyclopedia of Philosophy (Fall 2019 ed.), Metaphysics Research Lab, Stanford University, archived from the original on 2024-05-17, retrieved 2021-02-22