Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Isler, M. (1989). An ancient method of finding and extending direction.

Chicago Citation Edition Citation

Isler, M. An Ancient Method of Finding and Extending Direction. 1989.

MLA Citation Edition Citation

Isler, M. An Ancient Method of Finding and Extending Direction. 1989.