Speak, P., & Carter, A. H. C. (1981). Map reading and interpretation (New edition.). Longman.
Citación estilo ChicagoSpeak, P., and A. H. C. Carter. Map Reading and Interpretation. New edition. England: Longman, 1981.
Cita MLASpeak, P., and A. H. C. Carter. Map Reading and Interpretation. New edition. Longman, 1981.
Warning: These citations may not always be 100% accurate.