APA (7th ed.) Citation

Hall, R. A. (1974). External history of the Romance Languages. Elsevier.

Chicago Style (17th ed.) Citation

Hall, Robert Anderson. External History of the Romance Languages. New York [etc.]: Elsevier, 1974.

MLA (9th ed.) Citation

Hall, Robert Anderson. External History of the Romance Languages. Elsevier, 1974.

Warning: These citations may not always be 100% accurate.