APA (7th ed.) Citation

Merkel, B., Lydersen, C., Yoccoz, N., & Kovacs, K. (2013). The World's Northernmost Harbour Seal Population - How Many Are There? PLoS ONE, 8(7), e67576.

Chicago Style (17th ed.) Citation

Merkel, Benjamin, Christian Lydersen, Nigel Yoccoz, and Kit Kovacs. "The World's Northernmost Harbour Seal Population - How Many Are There?" PLoS ONE 8, no. 7 (2013): e67576.

MLA (9th ed.) Citation

Merkel, Benjamin, et al. "The World's Northernmost Harbour Seal Population - How Many Are There?" PLoS ONE, vol. 8, no. 7, 2013, p. e67576.