Ahlqvist, O., & Schlieder, C. (2020). Geogames and Geoplay. 1st ed. 2018. Springer International Publishing.
Trích dẫn kiểu ChicagoAhlqvist, Ola, và Christoph Schlieder. Geogames and Geoplay. 1st Ed. 2018. Springer International Publishing, 2020.
MLA citiranjeAhlqvist, Ola, và Christoph Schlieder. Geogames and Geoplay. 1st Ed. 2018. Springer International Publishing, 2020.
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