Porsch, F. (2016). Oliver Barstow: How to think like a Mountain. form.
Chicago-Zitierstil (17. Ausg.)Porsch, Franziska. "Oliver Barstow: How to Think like a Mountain." Form 2016.
MLA-Zitierstil (8. Ausg.)Porsch, Franziska. "Oliver Barstow: How to Think like a Mountain." Form, 2016.
警告：這些引文格式不一定是100％准確.