APA (7th ed.) Citation

任溶溶. 成语故事：杞人忧天.

Chicago Style (17th ed.) Citation

任溶溶. 成语故事：杞人忧天. 连环画出版社.

MLA (8th ed.) Citation

任溶溶. 成语故事：杞人忧天.

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