Ahlqvist, O., & Schlieder, C. (2020). Geogames and Geoplay. 1st ed. 2018. Springer International Publishing.
शिकागो स्टाइल उद्धरणAhlqvist, Ola, और Christoph Schlieder. Geogames and Geoplay. 1st Ed. 2018. Springer International Publishing, 2020.
एमएलए उद्धरणAhlqvist, Ola, और Christoph Schlieder. Geogames and Geoplay. 1st Ed. 2018. Springer International Publishing, 2020.
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