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Gales, N. J., W. D. Bowen, D. W. Johnston, K. M. Kovacs, C. L. Littnan, W. F. Perrin, J. E. Reynolds, and P. M. Thompson. “Guidelines for the treatment of marine mammals in field research.” Marine Mammal Science 25, no. 3 (July 1, 2009): 725–36. https://doi.org/10.1111/j.1748-7692.2008.00279.x.

Gales NJ, Bowen WD, Johnston DW, Kovacs KM, Littnan CL, Perrin WF, et al. Guidelines for the treatment of marine mammals in field research. Marine Mammal Science. 2009 Jul 1;25(3):725–36.

Gales, N. J., et al. “Guidelines for the treatment of marine mammals in field research.” Marine Mammal Science, vol. 25, no. 3, July 2009, pp. 725–36. Scopus, doi:10.1111/j.1748-7692.2008.00279.x.

Gales NJ, Bowen WD, Johnston DW, Kovacs KM, Littnan CL, Perrin WF, Reynolds JE, Thompson PM. Guidelines for the treatment of marine mammals in field research. Marine Mammal Science. 2009 Jul 1;25(3):725–736.