APA (7th ed.) Citation

Williams Roger. (1991). Insight Guides Catalonia. APA Publications.

Chicago Style (17th ed.) Citation

Williams Roger. Insight Guides Catalonia. Singapore: APA Publications, 1991.

MLA (9th ed.) Citation

Williams Roger. Insight Guides Catalonia. APA Publications, 1991.

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