Tirion grassengids.

MLA

Aichele, Dietmar. Tirion Grassengids. Baarn: Tirion, 2002.

APA

Aichele, D. (2002). Tirion grassengids. Baarn: Tirion.

Chicago

Aichele, Dietmar, Tirion Grassengids. Baarn: Tirion, 2002.