Guinery, M., & Howells, J. G. (1971). Twenty West African maps for certificate geography: A two-year course of graded mapwork exercises (3. impr.). Oxford Univ. Press.
Chicago-Zitierstil (17. Ausg.)Guinery, Michael, und J. G. Howells. Twenty West African Maps for Certificate Geography: A Two-year Course of Graded Mapwork Exercises. 3. impr. London [u.a.]: Oxford Univ. Press, 1971.
MLA-Zitierstil (9. Ausg.)Guinery, Michael, und J. G. Howells. Twenty West African Maps for Certificate Geography: A Two-year Course of Graded Mapwork Exercises. 3. impr. Oxford Univ. Press, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.