Cita APA (7a ed.)

Hempel, I., & van Franeker, J. A. (2003). Oberservation of birds at station PS14/158 along 49° West. PANGAEA.

Cita Chicago Style (17a ed.)

Hempel, Irmtraut, y Jan Andries van Franeker. Oberservation of Birds at Station PS14/158 Along 49° West. PANGAEA, 2003.

Cita MLA (9a ed.)

Hempel, Irmtraut, y Jan Andries van Franeker. Oberservation of Birds at Station PS14/158 Along 49° West. PANGAEA, 2003.