APA

Herge, . (1982). The seven crystal balls. Touran: Magnet.

Chicago

Herge, . 1982. The seven crystal balls. Touran: Magnet.

Harvard

Herge, . (1982). The seven crystal balls. Touran: Magnet.

MLA

Herge, . The seven crystal balls. Touran: Magnet. 1982.