Citazione Stile APA (7a Edizione)

Williamson, F., & Williamson, S. (2020). Higher geography: For SQA 2019 and beyond : course notes. Leckie & Leckie.

Citazione stile Chigago Style (17a edizione)

Williamson, Fiona, e Sheena Williamson. Higher Geography: For SQA 2019 and Beyond : Course Notes. Glasgow: Leckie & Leckie, 2020.

Citatione MLA (9a ed.)

Williamson, Fiona, e Sheena Williamson. Higher Geography: For SQA 2019 and Beyond : Course Notes. Leckie & Leckie, 2020.