Graham, E. A. (1982). The highlands of the lowlands: Environment and archaeology in the Stann Creek District, Belize, Central America. University of Cambridge.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Graham, Elizabeth Ann. The Highlands of the Lowlands: Environment and Archaeology in the Stann Creek District, Belize, Central America. University of Cambridge, 1982.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Graham, Elizabeth Ann. The Highlands of the Lowlands: Environment and Archaeology in the Stann Creek District, Belize, Central America. University of Cambridge, 1982.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.