Holt-Jensen, A. (1980). Geography, its history and concepts: A student's guide. London: Harper & Row.
استشهاد بنمط شيكاغوHolt-Jensen, Arild. Geography, Its History and Concepts: A Student's Guide. London: Harper & Row, 1980.
MLA استشهادHolt-Jensen, Arild. Geography, Its History and Concepts: A Student's Guide. London: Harper & Row, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.