APA (7th ed.) Citation

Hugo' s Simplified System. (1969). Italian in three months. Hugo's Language Books.

Chicago Style (17th ed.) Citation

Hugo' s Simplified System. Italian in Three Months. Londres: Hugo's Language Books, 1969.

MLA (9th ed.) Citation

Hugo' s Simplified System. Italian in Three Months. Hugo's Language Books, 1969.

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