Παραπομπή APA

The Academy of Natural Sciences. Proceedings of Natural Sciences of Philadephia. The Academy of Natural Sciences.

Παραπομπή Chicago Style

The Academy of Natural Sciences. Proceedings of Natural Sciences of Philadephia. Philadephia: The Academy of Natural Sciences.

Παραπομπή MLA

The Academy of Natural Sciences. Proceedings of Natural Sciences of Philadephia. The Academy of Natural Sciences.