APA (7th ed.) Citation

Herge. (2002). The adventures of Tintin: The seven cyrstal balls. Egmont UK Ltd.

Chicago Style (17th ed.) Citation

Herge. The Adventures of Tintin: The Seven Cyrstal Balls. London: Egmont UK Ltd, 2002.

MLA (9th ed.) Citation

Herge. The Adventures of Tintin: The Seven Cyrstal Balls. Egmont UK Ltd, 2002.

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