Waters, G. H. C. (1971). First lessons in physical geography (2. rev. ed., new impr.). Longman.
Cita Chicago Style (17a ed.)Waters, Grahame Hugh Clement. First Lessons in Physical Geography. 2. rev. ed., new impr. London: Longman, 1971.
Cita MLA (9a ed.)Waters, Grahame Hugh Clement. First Lessons in Physical Geography. 2. rev. ed., new impr. Longman, 1971.
Precaución: Estas citas no son 100% exactas.