APA

Banscherus J., .Kwiatkowski and the chewing gum mystery. Würzburg: .

Chicago

Banscherus Jürgen, .Kwiatkowski and the chewing gum mystery. Würzburg: .

Harvard

Banscherus J., .Kwiatkowski and the chewing gum mystery. Würzburg: .

MLA

Banscherus Jürgen, .Würzburg: . .