Citazione APA

Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. Pennsylvania Academy of Science.

Stile di citazione Chicago

Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. [Harrisburg]: Pennsylvania Academy of Science.

Citazione MLA

Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. Pennsylvania Academy of Science.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.