Citazione Stile APA (7a Edizione)

Hempel, I., & van Franeker, J. A. (2003). Observation of birds at station PS14/153 along 49° West. PANGAEA.

Citazione stile Chigago Style (17a edizione)

Hempel, Irmtraut, e Jan Andries van Franeker. Observation of Birds at Station PS14/153 Along 49° West. PANGAEA, 2003.

Citatione MLA (9a ed.)

Hempel, Irmtraut, e Jan Andries van Franeker. Observation of Birds at Station PS14/153 Along 49° West. PANGAEA, 2003.